Multimodal analysis of aluminum-steel dissimilar joint interface: Strength improvement mechanism through Ni addition 査読有り

Kiyoaki T. Suzuki, Shun Tokita, Sylvain Dancette, Yutaka S. Sato

255　114236　2025年7月

DOI： 10.1016/j.matdes.2025.114236 　

ISSN：0264-1275

Compositional gradient induced by heterogeneous domain synergy strategy toward high-performance diffusion bonding

Yinchen Wang, Zhijie Ding, Peng Li, Zhiwei Qin, Xiaoyang Bi, Liangliang Zhang, Chao Li, Honggang Dong, Huawei Sun, Yafang Cheng, Yutaka S. Sato

Composites Part B: Engineering　297　112330-112330　2025年5月

DOI： 10.1016/j.compositesb.2025.112330 　

ISSN：1359-8368

In situ tailoring microstructure of martensitic stainless steel during wire-arc directed energy deposition via intrinsic heat treatment

Zhiwei Lyu, Su Li, Yutaka S. Sato, Yue Zhao, Xi He, Zhifang Shi, Yifeng Xiao, Qiang Zhu

Journal of Manufacturing Processes　141　282-295　2025年5月

DOI： 10.1016/j.jmapro.2025.03.005 　

ISSN：1526-6125

Hybrid Inverse Modeling Technique to Determine the Fracture Properties of Intermetallic Layer Formed at Al/Steel Dissimilar Weld Interface

Kiyoaki T. Suzuki, Yutaka S. Sato, Shun Tokita, Joël Lachambre, Sylvain Dancette

Mechanisms and Machine Science　895-904　2025年3月18日

DOI： 10.1007/978-3-031-82907-9_67 　

ISSN：2211-0984

eISSN：2211-0992

Structural reliability assessment under creep-fatigue considering multiple uncertainty sources based on surrogate modeling approach 査読有り

Yuan-Ze Tang, Xian-Cheng Zhang, Hang-Hang Gu, Kai-Shang Li, Chang-Qi Hong, Shan-Tung Tu, Yutaka S. Sato, Run-Zi Wang

International Journal of Fatigue　192　108728-108728　2025年3月

DOI： 10.1016/j.ijfatigue.2024.108728 　

ISSN：0142-1123

Hybrid Inverse Modeling Technique to Determine the Fracture Properties of Intermetallic Layer Formed at Al/Steel Dissimilar Weld Interface

Kiyoaki T. Suzuki, Yutaka S. Sato, Shun Tokita, Joël Lachambre, Sylvain Dancette

Mechanisms and Machine Science　176　895-904　2025年

DOI： 10.1007/978-3-031-82907-9_67 　

ISSN：2211-0984

eISSN：2211-0992

Interfacial characteristics and microstructural evolution of austenitic to ferritic stainless steels bimetallic structure fabricated by wire-arc directed energy deposition 査読有り

Yipu Xu, Run-Zi Wang, Yutaka S. Sato, Shun Tokita, Yue Zhao, Zongli Yi, Aiping Wu

Additive Manufacturing　98　104629-104629　2025年1月

DOI： 10.1016/j.addma.2024.104629 　

ISSN：2214-8604

レーザ粉末床溶融結合法で得られたAl-10Si-Mg合金積層造形体のミクロ組織と機械的性質 査読有り

林飛勇向, 鴇田駿, 佐藤裕, 木村友則, 川中啓嗣, 保田雄亮, 朴勝煥

軽金属溶接　64　(12)　581-586　2024年12月

Creep-fatigue damage level evaluation based on the relationship between microstructural evolution and mechanical property degradation 査読有り

Li Sun, Xian-Cheng Zhang, Kai-Shang Li, Ji Wang, Shun Tokita, Yutaka S. Sato, Shan-Tung Tu, Run-Zi Wang

International Journal of Plasticity　181　104086-104086　2024年10月

DOI： 10.1016/j.ijplas.2024.104086 　

ISSN：0749-6419

Strain-Mediated Defect Engineering toward Rapid Atomic Migration in Fe–Al Diffusion Couples 査読有り

Zhijie Ding, Peng Li, Zhiwei Qin, Weiben Huang, Peng Zhao, Dianwu Zhou, Xiangchen Meng, Yutaka S. Sato, Honggang Dong

Nano Letters　2024年9月6日

DOI： 10.1021/acs.nanolett.4c03115 　

ISSN：1530-6984

eISSN：1530-6992

Improved strength and interfacial microstructure of dissimilar Al/steel weld via combined addition of Zn and Ni 査読有り

Kiyoaki T. Suzuki, Shun Omura, Shun Tokita, Yujiro Tatsumi, Sylvain Dancette, Yutaka S. Sato

Materials & Design　245　113302-113302　2024年9月

DOI： 10.1016/j.matdes.2024.113302 　

ISSN：0264-1275

Tailoring microstructure and mechanical properties of 17-4PH steel fabricated by wire-arc directed energy deposition via a combination of intrinsic and post-processing heat treatments 査読有り

Zhiwei Lyu, Yutaka S. Sato, Su Li, Wanghui Xu, Zhen Xu, Xiaogang Hu, Qiang Zhu

Additive Manufacturing　80　103954　2024年1月

DOI： 10.1016/j.addma.2023.103954 　

ISSN：2214-8604

Simultaneous enhancements of strength and ductility of wire arc additive manufactured 17-4PH steel via intrinsic heat treatment 査読有り

Zhiwei Lyu, Yutaka S. Sato, Wanghui Xu, Su Li, Zhen Xu, Xiaogang Hu, Xinggang Li, Qiang Zhu

Journal of Materials Processing Technology　321　118149-118149　2023年12月

DOI： 10.1016/j.jmatprotec.2023.118149 　

ISSN：0924-0136

Effects of material combination for ultrasonic spot welding on microstructure and strength of Al/Al, Al/Cu, and Al/Ni dissimilar joints 査読有り

Shun TOKITA, Cheng Yi LIU, Yutaka S. SATO

Journal of Materials Research and Technology　2023年9月

DOI： 10.1016/j.jmrt.2023.09.094 　

ISSN：2238-7854

Formation mechanism of microstructure inhomogeneity in a martensitic stainless steel during wire arc additive manufacturing

Z. Lyu, Y.S. Sato, S. Tokita, Y. Zhao, J. Jia, A. Wu

IIW Document II-425-2023　1-7　2023年7月

Microstructures and mechanical properties of AlCoCrFeNi2.1/6061-T6 aluminum-matrix composites prepared by friction stir processing 査読有り

Peng Li, Yiqi Tong, Xingxing Wang, Yutaka S. Sato, Honggang Dong

Materials Science and Engineering: A　863　144544-144544　2023年1月

DOI： 10.1016/j.msea.2022.144544 　

ISSN：0921-5093

Drastic Improvement in Dissimilar Aluminum-to-Steel Joint Strength by Combining Positive Roles of Silicon and Nickel Additions 査読有り

Kiyoaki T. Suzuki, Shun Omura, Shun Tokita, Yutaka S. Sato, Yujiro Tatsumi

Materials & Design　225　111444-111444　2023年1月

DOI： 10.1016/j.matdes.2022.111444 　

ISSN：0264-1275

Microstructure and mechanical property of gas tungsten arc and friction stir welds of L₁₂ precipitate FCC high-entropy alloy 査読有り

Poying Hsieh, Chihhsien Liao, Hungchih Liu, Poting Lin, Paikeng Shen, Shaowei Hunag, Yutaka S. Sato, Chewei Tsai

APL Materials　10　(11)　111111-111111　2022年11月1日

DOI： 10.1063/5.0117251 　

eISSN：2166-532X

Homogenization of microstructure and mechanical properties of wire arc additive manufactured martensitic stainless steel through optimization of post-process heat treatment 査読有り

Zhiwei Lyu, Yutaka S. Sato, Shun Tokita, Yue Zhao, Jinlong Jia, Aiping Wu

Journal of Materials Research and Technology　21　2682-2692　2022年11月

DOI： 10.1016/j.jmrt.2022.10.077 　

ISSN：2238-7854

Twin Boundary Induced Grain Coarsening in Friction Stir Welding of Fine- and Ultra-Fine-Grained Commercially Pure Titanium Base Metals 査読有り

Jae-Deuk Kim, Siva Prasad Murugan, Seong-Woo Choi, Yutaka S. Sato, Jae-Keun Hong, Changwook Ji, Chang-Sub Kwak, Yeong-Do Park

Metals　12　(8)　1361-1361　2022年8月16日

DOI： 10.3390/met12081361 　

eISSN：2075-4701

結晶構造解析を用いたAl-Al超音波接合の条件適正化 査読有り

伊藤 宜司, 相澤 隆博, 浮田 康成, 佐藤 裕

エレクトロニクス実装学会誌　25　(3)　232-239　2022年5月1日

DOI： 10.5104/jiep.jiep-d-21-00090 　

ISSN：1343-9677

eISSN：1884-121X

Effect of Ni Addition on the Interfacial Strength of Al/Cu Dissimilar Welds Produced by Friction Stir Lap Welding 査読有り

Kota Kurabayashi, Shun Tokita, Yutaka S. Sato

Metals　12　(3)　453-453　2022年3月7日

DOI： 10.3390/met12030453 　

eISSN：2075-4701

炭素鋼の摩擦攪拌接合性に及ぼす水中施工および表面錆の影響 査読有り

佐藤裕, 宮森智子, 鴇田駿, 粉川博之

鉄と鋼　108　(12)　902-910　2022年

DOI： 10.2355/tetsutohagane.tetsu-2022-024 　

ISSN：0021-1575

eISSN：1883-2954

Microstructure and properties of multilayer WC-40Co coating on Ti-6Al-4V by electron beam cladding 査読有り

Wenqin Wang, Shiqi Zhang, Sheng Xiao, Yutaka S. Sato, De Wang, Yong Liu, Donglei Liu, Qiang Hu

Materials Characterization　183　111585-111585　2022年1月

DOI： 10.1016/j.matchar.2021.111585 　

ISSN：1044-5803

Microstructural evolution in a thin wall of 2Cr13 martensitic stainless steel during wire arc additive manufacturing 査読有り

Zhiwei Lyu, Yutaka S. Sato, Shun Tokita, Yue Zhao, Jinlong Jia, Aiping Wu

Materials Characterization　182　111520-111520　2021年12月

DOI： 10.1016/j.matchar.2021.111520 　

ISSN：1044-5803

Microstructural distribution and anisotropic tensile behavior in a 2Cr13 martensitic stainless steel thin wall fabricated by wire arc additive manufacturing 査読有り

Zhiwei Lyu, Yutaka S. Sato, Shun Tokita, Yue Zhao, Jinlong Jia, Aiping Wu

Materials Today Communications　29　102870-102870　2021年10月

DOI： 10.1016/j.mtcomm.2021.102870 　

ISSN：2352-4928

Microstructure characterization and wear performance of WC-10Co/Ti-6Al-4V coating fabricated via electron beam cladding 査読有り

Yawei Chen, De Wang, Wenqin Wang, Yong Liu, Yutaka S. Sato, Tomiko Yamaguchi, Yunxia Chen, Chenghai Wang

Surface and Coatings Technology　422　127493-127493　2021年9月

DOI： 10.1016/j.surfcoat.2021.127493 　

ISSN：0257-8972

The role of shot peening on liquation cracking in laser cladding of K447A nickel superalloy powders over its non-weldable cast structure

Zhenlin Zhang, Yue Zhao, Jiguo Shan, Aiping Wu, Yutaka S. Sato, Shun Tokita, Kota Kadoi, Hiroshige Inoue, Huaipeng Gu, Xin Tang

Materials Science and Engineering: A　823　141678-141678　2021年8月

DOI： 10.1016/j.msea.2021.141678 　

ISSN：0921-5093

Microstructural Control of the Interface Layer for Strength Enhancement of Dissimilar Al/Cu Joints via Ni Addition during TIG Arc Brazing 査読有り

Hiroki S. Furuya, Sakiko Yabu, Yutaka S. Sato, Hiroyuki Kokawa

Metals　11　(3)　491-491　2021年3月16日

DOI： 10.3390/met11030491 　

eISSN：2075-4701

Hardness distribution and aging response associated with precipitation behavior in a laser pressure welded Al–Li alloy 2198 査読有り

Tianbo Zhao, Yutaka S. Sato, Rongshi Xiao, Ting Huang, Jingquan Zhang

Materials Science and Engineering: A　808　140946-140946　2021年3月

DOI： 10.1016/j.msea.2021.140946 　

ISSN：0921-5093

Effect of Tool Geometries on “Heat-Input” During Friction Stir Welding of Aluminum Alloys 招待有り 査読有り

Yutaka S. Sato, Yuichiro Tanai, Dalong Yi, Tianbo Zhao, Hiroyuki Kokawa

Friction Stir Welding and Processing XI, The Minerals, Metals & Materials Series　171-177　2021年

DOI： 10.1007/978-3-030-65265-4_16 　

ISSN：2367-1181

eISSN：2367-1696

Evolution behavior of liquid film in the heat-affected zone of laser cladding non-weldable nickel-based superalloy 査読有り

Zhenlin Zhang, Yue Zhao, Jiguo Shan, Aiping Wu, Yutaka S. Sato, Shun Tokita, Kota Kadoi, Hiroshige Inoue, Huaipeng Gu, Xin Tang

Journal of Alloys and Compounds　863　158463-158463　2021年1月

DOI： 10.1016/j.jallcom.2020.158463 　

ISSN：0925-8388

Heterogeneous structure-induced strength-ductility synergy by partial recrystallization during friction stir welding of a high-entropy alloy 査読有り

Po-Ting Lin, Hung-Chi Liu, Po-Ying Hsieh, Cheng-Yu Wei, Che-Wei Tsai, Yutaka S. Sato, Shih-Che Chen, Hung-Wei Yen, Nian-Hu Lu, Chih-Hsuan Chen

Materials & Design　197　109238-109238　2021年1月

DOI： 10.1016/j.matdes.2020.109238 　

ISSN：0264-1275

Rapid Joining of Commercial-Purity Ti to 304 Stainless Steel Using Joule Heating Diffusion Bonding: Interfacial Microstructure and Strength of the Dissimilar Joint 招待有り 査読有り

K. T. Suzuki, Y. S. Sato, S. Tokita

Metals　10　(12)　1689-1689　2020年12月18日

DOI： 10.3390/met10121689 　

eISSN：2075-4701

Suppression of intergranular corrosion by surface grain boundary engineering of 304 austenitic stainless steel using laser peening plus annealing 査読有り

Shun Tokita, Hiroyuki Kokawa, Shohei Kodama, Yutaka S. Sato, Yuji Sano, Zhuguo Li, Kai Feng, Yixiong Wu

Materials Today Communications　25　101572-101572　2020年12月

DOI： 10.1016/j.mtcomm.2020.101572 　

ISSN：2352-4928

Effects of rotational speed on the Al0.3CoCrCu0.3FeNi high-entropy alloy by friction stir welding 査読有り

Po-Ting Lin, Chan-Sheng Wu, Chun-Hao Peng, Che-Wei Tsai, Yutaka S. Sato

High Temperature Materials and Processes　39　(1)　556-566　2020年11月24日

DOI： 10.1515/htmp-2020-0046 　

ISSN：0334-6455

eISSN：2191-0324

The role of the pulsed-wave laser characteristics on restraining hot cracking in laser cladding non-weldable nickel-based superalloy 査読有り

Zhenlin Zhang, Yue Zhao, Yang Chen, Zhen Su, Jiguo Shan, Aiping Wu, Yutaka S. Sato, Huaipeng Gu, Xin Tang

Materials & Design　198　109346-109346　2020年11月

DOI： 10.1016/j.matdes.2020.109346 　

ISSN：0264-1275

Microstructural Characterization of Friction-Stir Processed Ti-6Al-4V 査読有り

Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa, Satoshi Hirano, Adam L. Pilchak, Sheldon Lee Semiatin

Metals　10　(7)　976-976　2020年7月20日

DOI： 10.3390/met10070976 　

eISSN：2075-4701

Predicting Tensile Properties of Friction-Stir-Welded 6063 Aluminum with Experimentally Measured Welding Heat Input 査読有り

Tianbo Zhao, Yutaka S. Sato, Hiroyuki Kokawa, Kazuhiro Ito

Acta Metallurgica Sinica (English Letters)　33　(9)　1235-1242　2020年7月9日

DOI： 10.1007/s40195-020-01099-9 　

ISSN：1006-7191

eISSN：2194-1289

Joining condition dependency of joint resistance in ultrasonic welding of high-temperature superconducting tapes with indium 査読有り

S Ito, R Hayasaka, K Yuki, Y S Sato, H Hashizume

Journal of Physics: Conference Series　1559　012065-012065　2020年6月

DOI： 10.1088/1742-6596/1559/1/012065 　

ISSN：1742-6588

eISSN：1742-6596

Laser pressure welding of Al-Li alloy 2198: effect of welding parameters on fusion zone characteristics associated with mechanical properties 査読有り

Tianbo Zhao, Yutaka S. Sato, Rongshi Xiao, Ting Huang, Jingquan Zhang

High Temperature Materials and Processes　39　(1)　146-156　2020年5月27日

DOI： 10.1515/htmp-2020-0047 　

ISSN：0334-6455

eISSN：2191-0324

Grain Structure Evolution during Friction-Stir Welding 査読有り

S. Mironov, Y.S. Sato, H. Kokawa

Physical Mesomechanics　23　(1)　21-31　2020年1月

Effect of thermomechanical parameters on grain growth and recrystallization during grain boundary engineering of austenitic stainless steel

Shun Tokita, Hiroyuki Kokawa, Yutaka S. Sato

7th International Conference on Recrystallization and Grain Growth　1270　012031-012031　2019年8月

DOI： 10.1088/1742-6596/1270/1/012031 　

ISSN：1742-6588

eISSN：1742-6596

Comparison of Heat Assisted Lap Joints of High-Temperature Superconducting Tapes with Inserted Indium Foils 査読有り

S. Ito, H.T. Fujii, R. Hayasaka, Y.S. Sato, H. Hashizume

IEEE Transactions of Applied Superconductivity　29　(5)　6600405　2019年8月

DOI： 10.1109/TASC.2019.2892050 　

Novel analytical approach for evaluating the mechanical properties of friction stir spot joints through constitutive modeling 査読有り

A. Barabi, A. Zarei-Hanzaki, M. Mosayebi, A. Mohamadizadeh, A.S. Anoushe, H.R. Abedi, A. Maghsoudlou, Y.S. Sato

Engineering Fracture Mechanics　216　106522-106522　2019年7月

DOI： 10.1016/j.engfracmech.2019.106522 　

ISSN：0013-7944

Crystallography of Martensite in Friction-Stir-Welded 12Cr Heat-Resistant Steel 査読有り

Peng Hua, Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa, Seung Hwang, C. Park, Satoshi Hirano

Metallurgical and Materials Transactions A　50A　(7)　3158-3163　2019年7月

DOI： 10.1007/s11661-019-05220-1 　

ISSN：1073-5623

Influence of Welding Temperature on Material Flow During Friction Stir Welding of AZ31 Magnesium Alloy 査読有り

S. Mironov, Y.S. Sato, H. Kokawa

Metallurgical and Materials Transactions A　50A　2798-2806　2019年6月

DOI： 10.1007/s11661-019-05194-0 　

Material Flow and Microstructure Evolution in Corner Friction Stir Welding of 5083 Al Alloy Using AdStir Technology 査読有り

Kunitaka Masaki, Hiroshi Saito, Koji Nezaki, Shoko Kitamoto, Yutaka S. Sato, Hiroyuki Kokawa

Friction Stir Welding and Processing X, The Minerals, Metals & Materials Society　181-188　2019年3月

DOI： 10.1007/978-3-030-05752-7_17 　

Improvement of Interfacial Strength with the Addition of Ni in Al/Cu Dissimilar Joints Produced via Laser Brazing 査読有り

H.S. Furuya, Y.S. Sato, H. Kokawa, T. Huang, R.S. Xiao

Metallurgical and Materials Transactions A　49　(12)　6215-6223　2018年12月

DOI： 10.1007/s11661-018-4938-z 　

Friction-stir processing

Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa

Nanocrystalline Titanium　55-69　2018年9月20日

DOI： 10.1016/B978-0-12-814599-9.00004-3 　

新規コバルト基合金接合ツールを用いた純銅の高速摩擦攪拌接合の可能性 査読有り

佐藤裕, 稲垣宏典, 藤井啓道, 粉川博之

銅と銅合金　57　(1)　122-126　2018年8月

ISSN：1347-7234

Microstructural Evolution During the Thermomechanical Process for Grain Boundary Engineering of Austenitic Stainless Steel

Shun Tokita, Hiroyuki Kokawa, Yutaka S. Sato, Hiromichi T. Fujii

The 71st IIW Annual Assembly & International Conference　IX-2645-18　1-12　2018年7月

Experimental measurement of welding heat-input and its responses to mechanical properties during friction stir welding of aluminum alloy 6063 査読有り

T. Zhao, Y.S. Sato, H. Kokawa, K. Ito

Proceedings of 12th International Symposium on Friction Stir Welding, Chicoutimi, Quebec, Canada　CD-ROM　2018年6月

Interfacial microstructure evolution and weld formation during ultrasonic welding of Al alloy to Cu 査読有り

H. T. Fujii, H. Endo, Y. S. Sato, H. Kokawa

Materials Characterization　139　233-240　2018年5月1日

DOI： 10.1016/j.matchar.2018.03.010 　

ISSN：1044-5803

Microstructure and tensile behavior of friction-stir welded TRIP steel 査読有り

S. Mironov, Y. S. Sato, S. Yoneyama, H. Kokawa, H. T. Fujii, S. Hirano

Materials Science and Engineering A　717　26-33　2018年2月21日

DOI： 10.1016/j.msea.2018.01.053 　

ISSN：0921-5093

Strength Improvement Through Grain Refinement of Intermetallic Compound at Al/Fe Dissimilar Joint Interface by the Addition of Alloying Elements 査読有り

H. S. Furuya, Y. T. Sato, Y. S. Sato, H. Kokawa, Y. Tatsumi

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science　49　(2)　527-536　2018年2月1日

DOI： 10.1007/s11661-017-4442-x 　

ISSN：1073-5623

Friction-Stir-WeldingおよびGas-Tungsten- Arc-Weldingのハイブリット法による低炭素鋼の高速接合

杉本 一等, 朴 勝煥, 平野 聡, 波多 聰, 佐藤 裕, 粉川 博之, 石田 清仁

溶接学会論文集　36　(1)　26-30　2018年

DOI： 10.2207/qjjws.36.26 　

ISSN：0288-4771

In situ EBSD observation of grain boundary character distribution evolution during thermomechanical process used for grain boundary engineering of 304 austenitic stainless steel 査読有り

Shun Tokita, Hiroyuki Kokawa, Yutaka S. Sato, Hiromichi T. Fujii

MATERIALS CHARACTERIZATION　131　31-38　2017年9月

DOI： 10.1016/j.matchar.2017.06.032 　

ISSN：1044-5803

eISSN：1873-4189

Microstructural changes during tension of friction-stir welded AZ31 magnesium alloy 査読有り

S. Mironov, T. Onuma, Y. S. Sato, S. Yoneyama, H. Kokawa

MATERIALS CHARACTERIZATION　130　1-8　2017年8月

DOI： 10.1016/j.matchar.2017.05.016 　

ISSN：1044-5803

eISSN：1873-4189

High-strain-rate deformation in ultrasonic additive manufacturing 査読有り

Hiromichi T. Fujii, Saki Shimizu, Yutaka S. Sato, Hiroyuki Kokawa

SCRIPTA MATERIALIA　135　125-129　2017年7月

DOI： 10.1016/j.scriptamat.2016.12.030 　

ISSN：1359-6462

Evaluation of heat input during friction stir welding of aluminium alloys 査読有り

D. Yi, T. Onuma, S. Mironov, Y. S. Sato, H. Kokawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　22　(1)　41-46　2017年

DOI： 10.1080/13621718.2016.1183079 　

ISSN：1362-1718

eISSN：1743-2936

Tensile behavior of friction-stir welded AZ31 magnesium alloy 査読有り

S. Mironov, T. Onuma, Y. S. Sato, S. Yoneyama, H. Kokawa

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　679　272-281　2017年1月

DOI： 10.1016/j.msea.2016.10.036 　

ISSN：0921-5093

eISSN：1873-4936

Feasibility of Iridium Containing Nickel Based Superalloy Tool to Friction Stir Spot Welding of High Strength Steel 査読有り

Kunihiro Tanaka, Tatsuya Nakazawa, Koichi Sakairi, Yutaka Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida

FRICTION STIR WELDING AND PROCESSING IX　29-35　2017年

DOI： 10.1007/978-3-319-52383-5_4 　

ISSN：2367-1181

Performance of Tungsten-Based Alloy Tool Developed for Friction Stir Welding of Austenitic Stainless Steel 査読有り

Yutaka Sato, Ayuri Tsuji, Tomohiro Takida, Akihiko Ikegaya, Akinori Shibata, Hiroshi Ishizuka, Hideki Moriguchi, Shinichi Susukida, Hiroyuki Kokawa

FRICTION STIR WELDING AND PROCESSING IX　47-52　2017年

DOI： 10.1007/978-3-319-52383-5_6 　

ISSN：2367-1181

Influence of Underwater Operation on Friction Stir Welding of Medium Carbon Steel 査読有り

Tomoko Miyamori, Yutaka Sato, Hiroyuki Kokawa

FRICTION STIR WELDING AND PROCESSING IX　23-28　2017年

DOI： 10.1007/978-3-319-52383-5_3 　

ISSN：2367-1181

Effect of additional element on interfacial strength at Al/Fe dissimilar metal weld by TIG arc brazing 査読有り

Hiroki Furuya, Yoshikatsu Sato, Yutaka S. Sato, Hiroyuki Kokawa, Yujiro Tatsumi

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　794-797　2016年10月

Effect of cooling rate on microstructure of friction-stir welded aluminum alloy 1100 査読有り

S. Mironov, D. Yi, Y.S. Sato, H. Kokawa

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　733-736　2016年10月

Microstrucutre and mechanical properties of friction stir processed ferritic steel 査読有り

Lauri Luumi, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　879-881　2016年10月

Underwater friction stir welding of medium carbon steel 査読有り

Tomoko Miyamori, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　465-468　2016年10月

Development of advanced W-based alloy tool for FSW of stainless steel 査読有り

Ayuri Tsuji, Yutaka S. Sato, Hiroyuki Kokawa, Shinich Susukida, Hiroyuki Ishizuka, Hideki Moriguchi, Akinori Shibata, Akihiko Ikegaya, Tomohiro Takida

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　462-464　2016年10月

Properties of multilayer friction stir welding joint in SUS316L clad steel 査読有り

Yuta Honma, Kunihiko Hashi, Rinzo Kayano, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　871-874　2016年10月

Weld formation in ultrasonic welding of Al alloy to Cu 査読有り

Hiromichi T. Fujii, Hiroki Endo, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of 10th International Conference on Trends in Welding Research and 9th International Welding Symposium of Japan Welding Symposium　250-253　2016年10月

Life prolongation of cobalt-based alloy tool during friction stir welding of medium carbon steel via microstructure modification 査読有り

Yutaka S. Sato, Masahiro Miyake, Shinichi Susukida, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan, C. Park, Itto Sugimoto, Satoshi Hirano

IIW Doc. IX-2584-16　1-9　2016年7月

Wear of Cobalt-Based Alloy Tool During Friction Stir Welding of Ti-6Al-4V Alloy 査読有り

Yutaka S. Sato, Shinichi Susukida, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan, C. Park, Itto Sugimoto, Satoshi Hirano

Proceedings of 11th International Friction Stir Welding Symposium, Cambridge, UK, 17-19 May 2016　CD-ROM　2016年5月

Performance of iridium containing nickel base superalloy tool for friction stir welding of Ti-6Al-4V alloy 査読有り

Tatsuya Nakazawa, Kunihiro Tanaka, Koichi Sakairi, Yutaka S. Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Satoshi Hirano

Proceedings of 11th International Friction Stir Welding Symposium, Cambridge, UK, 17-19 May 2016　CD-ROM　2016年5月

Microstructure and lap shear strength of the weld interface in ultrasonic welding of Al alloy to stainless steel 査読有り

Hiromichi T. Fujii, Yuta Goto, Yutaka S. Sato, Hiroyuki Kokawa

SCRIPTA MATERIALIA　116　135-138　2016年4月

DOI： 10.1016/j.scriptamat.2016.02.004 　

ISSN：1359-6462

Influencing factors on nugget formation during multipoint welding by single side resistance spot welding

Hitomi Nishibata, Shota Kikuchi, Masato Uchihara, Yutaka S. Sato, Hiroyuki Kokawa

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society　34　(1)　42-49　2016年

DOI： 10.2207/qjjws.34.42 　

ISSN：0288-4771

片側スポット多点溶接におけるナゲット形成挙動への影響因子の検討 査読有り

西畑ひとみ, 菊池庄太, 福本学, 内原正人, 佐藤裕, 粉川博之

溶接学会論文集　34　(1)　42-49　2016年1月

Effect of cooling rate on microstructure of friction-stir welded AA1100 aluminum alloy 査読有り

D. Yi, S. Mironov, Y. S. Sato, H. Kokawa

PHILOSOPHICAL MAGAZINE　96　(18)　1965-1977　2016年

DOI： 10.1080/14786435.2016.1185186 　

ISSN：1478-6435

eISSN：1478-6443

Mechanical Properties and Microstructure of Dissimilar Friction Stir Welds of 11Cr-Ferritic/Martensitic Steel to 316 Stainless Steel 査読有り

Yutaka S. Sato, Hiroyuki Kokawa, Hiromichi T. Fujii, Yasuhide Yano, Yoshihiro Sekio

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　46A　(12)　5789-5800　2015年12月

DOI： 10.1007/s11661-015-3152-5 　

ISSN：1073-5623

eISSN：1543-1940

Effect of post-GBE strain on weld decay resistance of grain boundary engineered 304 austenitic stainless steel 査読有り

S. Tokita, M. Ikeshoji, G. Yamada, K. Kurihara, H. Kokawa, Y. S. Sato, H. T. Fujii

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　20　(8)　702-707　2015年11月

DOI： 10.1179/1362171815Y.0000000061 　

ISSN：1362-1718

eISSN：1743-2936

Microstructure evolution during friction-stir welding of AZ31 magnesium alloy 査読有り

S. Mironov, T. Onuma, Y. S. Sato, H. Kokawa

ACTA MATERIALIA　100　301-312　2015年11月

DOI： 10.1016/j.actamat.2015.08.066 　

ISSN：1359-6454

eISSN：1873-2453

Microstructure and mechanical properties in dissimilar friction stir butt weld between austenitic stainless steel and ferritic heat-resistant steel 査読有り

Y.S. Sato, H. Kokawa, H.T. Fujii, Y. Yano, Y. Sekio

IIW Doc. IX-2531-15　1-6　2015年7月

A study of friction stir welding for clad pipelines 査読有り

T. Katayama, Y. Kisaka, F. Kimura, Y.S. Sato, H. Kokawa

Friction Stir Welding and Processing VIII, Published by John Wiley & Sons, Inc., Hoboken, NJ, USA　3-10　2015年3月

Performance enhancement of Co-based alloy tool for friction stir welding of ferritic steel 査読有り

Y.S. Sato, M. Miyake, S. Susukida, H. Kokawa, T. Omori, K. Ishida, S. Imano, S.H.C. Park, I. Sugimoto, S. Hirano

Friction Stir Welding and Processing VIII, Published by John Wiley & Sons, Inc., Hoboken, NJ, USA　39-46　2015年3月

Friction stir welding of steels using a tool made of iridium-containing nickel base superalloy 査読有り

T. Nakazawa, Y.S. Sato, H. Kokawa, K. Ishida, T. Omori, K. Tanaka, K. Sakairi

Friction Stir Welding and Processing VIII, Published by John Wiley & Sons, Inc., Hoboken, NJ, USA　77-82　2015年3月

Effect of Welding Temperature on Microstructure of Friction-stir Welded Aluminum Alloy 1050 査読有り

Sergey Mironov, Kosuke Inagaki, Yutaka S. Sato, Hiroyuki Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　46A　(2)　783-790　2015年2月

DOI： 10.1007/s11661-014-2651-0 　

ISSN：1073-5623

eISSN：1543-1940

Microstructural evolution of pure copper during friction-stir welding 査読有り

S. Mironov, K. Inagaki, Y. S. Sato, H. Kokawa

PHILOSOPHICAL MAGAZINE　95　(4)　367-381　2015年2月

DOI： 10.1080/14786435.2015.1006293 　

ISSN：1478-6435

eISSN：1478-6443

Mechanism of weld formation during very-high-power ultrasonic additive manufacturing of Al alloy 6061 査読有り

S. Shimizu, H. T. Fujii, Y. S. Sato, H. Kokawa, M. R. Sriraman, S. S. Babu

ACTA MATERIALIA　74　234-243　2014年8月

DOI： 10.1016/j.actamat.2014.04.043 　

ISSN：1359-6454

eISSN：1873-2453

A Study of Friction Stir Welding for Clad Pipelines 査読有り

T. Katayama, Y. Kisaka, F. Kimura, Y.S. Sato, H. Kokawa

IIW Doc. XII-2177-14　2014　1-14　2014年7月

DOI： 10.14920/jwstaikai.2014f.0_12 　

Microstructure and mechnanical properties of friction stir welded 11Cr-ferritic/martensitic steel 査読有り

Y.S. Sato, H. Kokawa, Y. Yano, Y. Sekio

IIW Doc. IX-2476-14　1-6　2014年7月

Bond formation between Al tapes during very high power ultrasonic additive manufacturing 査読有り

H.T. Fujii, S. Shimizu, Y.S. Sato, H. Kokawa, S.M. Ramanujam, S.S. Babu

IIW Doc. IX-2484-14　1-8　2014年7月

Tool material factors for suppression of wear in Co-based alloy tool during friction stir welding of 0.45C steel 査読有り

Y.S. Sato, M. Miyake, H. Kokawa, T. Omori, K. Ishida, S. Imano, I. Sugimoto, S.H.C. Park, S. Hirano

Proceedings of 10th International Friction Stir Welding Symposium, Beijing, China, 20-22 May 2014　CD-ROM　2014年5月

Microstructural aspects of friction stir welding 査読有り

S. Mironov, Y.S. Sato, H. Kokawa

Proceedings of 10th International Friction Stir Welding Symposium, Beijing, China, 20-22 May 2014　CD-ROM　2014年5月

Microstructure evolution of the Invar 36 alloy FSW joint 査読有り

A. Wu, Y. Zhao, G. Zou, Y.S. Sato, H. Kokawa

Proceedings of 10th International Friction Stir Welding Symposium, Beijing, China, 20-22 May 2014　CD-ROM　2014年5月

Effect of second pass in 2-sided FSW of high strength structural steel 査読有り

L. Luumi, P. Vilaca, Y.S. Sato, H. Hanninen, H. Kokawa

Proceedings of 10th International Friction Stir Welding Symposium, Beijing, China, 20-22 May 2014　CD-ROM　2014年5月

Effect of swaging on Young’s modulus of β Ti-33.6Nb-4Sn alloy 査読有り

Shuji Hanada, Naoya Masahashi, Taek Kyun Jung, Masahiro Miyake, Yutaka S. Sato, Hiroyuki Kokawa

Journal of the Mechanical Behavior of Biomedical Materials　32　310-320　2014年4月

DOI： 10.1016/j.jmbbm.2013.10.027 　

ISSN：1751-6161

eISSN：1878-0180

Microstructural evolution in dissimilar joint of Al alloy and Cu during ultrasonic welding 査読有り

H.T. Fujii, Y. Goto, Y.S. Sato, H. Kokawa

Materials Science Forum　783-786　2747-2752　2014年

DOI： 10.4028/www.scientific.net/MSF.783-786.2747 　

Structural response of metals to friction-stir welding 査読有り

S. Mironov, Y.S. Sato, H. Kokawa

Letters on materials　4　(2)　108-113　2014年

Microstructure and properties in friction stir weld of 12Cr steel 査読有り

P. Hua, S. Moronov, C. Z. Nie, Y. S. Sato, H. Kokawa, S. H. C. Park, S. Hirano

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　19　(1)　76-81　2014年1月

DOI： 10.1179/1362171813Y.0000000167 　

ISSN：1362-1718

Development of grain structure during friction-stir welding of Cu-30Zn brass 査読有り

S. Mironov, K. Inagaki, Y. S. Sato, H. Kokawa

PHILOSOPHICAL MAGAZINE　94　(27)　3137-3148　2014年

DOI： 10.1080/14786435.2014.951712 　

ISSN：1478-6435

eISSN：1478-6443

Mechanical properties of friction stir welded 11Cr-ferritic/martensitic steel 査読有り

Y. Yano, Y. S. Sato, Y. Sekio, S. Ohtsuka, T. Kaito, R. Ogawa, H. Kokawa

JOURNAL OF NUCLEAR MATERIALS　442　(1-3)　S524-S528　2013年11月

DOI： 10.1016/j.jnucmat.2012.10.038 　

ISSN：0022-3115

eISSN：1873-4820

Grain Structure Development During Friction Stir Welding of Single-Crystal Austenitic Stainless Steel 査読有り

Jong Jin Jeon, Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa, Seung Hwan C. Park, Satoshi Hirano

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　44A　(7)　3157-3166　2013年7月

DOI： 10.1007/s11661-013-1692-0 　

ISSN：1073-5623

eISSN：1543-1940

Anisotropy of structural response of single crystal austenitic stainless steel to friction stir welding 査読有り

J. Jeon, S. Mironov, Y. S. Sato, H. Kokawa, S. H. C. Park, S. Hirano

ACTA MATERIALIA　61　(9)　3465-3472　2013年5月

DOI： 10.1016/j.actamat.2013.02.039 　

ISSN：1359-6454

Effect of post-GBE strain-sensitisation on corrosion resistance of grain boundary engineered 304 austenitic stainless steel 査読有り

Gouki Yamada, Hiroyuki Kokawa, Yu Yasuda, Shun Tokita, Takashi Yokoyama, Yutaka S. Sato, Hiromichi T. Fujii, Sadahiro Tsurekawa

PHILOSOPHICAL MAGAZINE　93　(10-12)　1443-1453　2013年4月

DOI： 10.1080/14786435.2012.762467 　

ISSN：1478-6435

Temperature and force response characteristics of friction stir welding on Invar 36 alloy 査読有り

Y. Zhao, A. P. Wu, J. L. Ren, Y. S. Sato, H. Kokawa, M. Miyake, D. Y. Yan

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　18　(3)　232-238　2013年4月

DOI： 10.1179/1362171812Y.0000000077 　

ISSN：1362-1718

eISSN：1743-2936

Texture Produced by Abnormal Grain Growth in Friction Stir-Welded Aluminum Alloy 1050 査読有り

Sergey Mironov, Kunitaka Masaki, Yutaka S. Sato, Hiroyuki Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　44A　(3)　1153-1157　2013年3月

DOI： 10.1007/s11661-012-1596-4 　

ISSN：1073-5623

Effect of welding parameters on the microstructure and mechanical properties of a friction stir welded 11Cr-ferritic/martensitic steel 招待有り 査読有り

Y.S. Sato, H. Kokawa, Y. Yano, Y. Sekio

Friction Stir Welding and Processing VII, Published by John Wiley & Sons, Inc., Hoboken, NJ, USA　91-99　2013年3月

Friction-stir-welding of thick carbon steels using Co-based alloy tool 査読有り

I Sugimoto, A. Sato, S.H.C. Park, S. Hirano, S. Imano, Y.S. Sato, H. Kokawa, T. Omori, K. Ishida

Friction Stir Welding and Processing VII, Published by John Wiley & Sons, Inc., Hoboken, NJ, USA　101-106　2013年3月

Interface microstructure and mechanical properties of dissimilar joint between 6061 Al alloy and 304 stainless steel by ultrasonic welding 査読有り

H.T. Fujii, Y. Goto, Y.S. Sato, H. Kokawa

IIW documents　(IX-2445-13)　1-8　2013年

Friction stir welding of single crystal austenitic stainless steel 査読有り

K. Ikeda, J. J. S. Jeon, S. Mironov, Y. S. Sato, H. T. Fujii, H. Kokawa, S. H. C. Park, S. Hirano

PROCEEDINGS OF THE 1ST INTERNATIONAL JOINT SYMPOSIUM ON JOINING AND WELDING　449-451　2013年

Friction stir welding of grain boundary engineered 304 austenitic stainless steel 査読有り

S. Tokita, T. Yokoyama, H. Kokawa, Y. S. Sato, H. T. Fujii

PROCEEDINGS OF THE 1ST INTERNATIONAL JOINT SYMPOSIUM ON JOINING AND WELDING　407-409　2013年

Effect of peak temperature during friction stir welding on microstructure evolution of aluminum alloy 1050 査読有り

K. Inagaki, S. Mironov, Y. S. Sato, H. T. Fujii, H. Kokawa

PROCEEDINGS OF THE 1ST INTERNATIONAL JOINT SYMPOSIUM ON JOINING AND WELDING　41-44　2013年

Microstructure evolution of metallic materials during friction stir welding 査読有り

H. Kokawa, Y. S. Sato, S. Mironov

PROCEEDINGS OF THE 1ST INTERNATIONAL JOINT SYMPOSIUM ON JOINING AND WELDING　5-13　2013年

Relationship between material flow and abnormal grain growth in friction-stir welds 査読有り

S. Mironov, K. Masaki, Y. S. Sato, H. Kokawa

SCRIPTA MATERIALIA　67　(12)　983-986　2012年12月

DOI： 10.1016/j.scriptamat.2012.09.002 　

ISSN：1359-6462

Microstructural studies of friction stir welded Zircaloy-4 査読有り

Yutaka S. Sato, Yoshito Nagahama, Sergey Mironov, Hiroyuki Kokawa, Seung Hwan C. Park, Satoshi Hirano

SCRIPTA MATERIALIA　67　(3)　241-244　2012年8月

DOI： 10.1016/j.scriptamat.2012.04.029 　

ISSN：1359-6462

Microstructural evolution during tool plunging stage of friction stir welding in single crystal austenitic stainless steel 査読有り

J. Jeon, S. Mironov, Y.S. Sato, H. Kokawa, S.H.C. Park, S. Hirano

IIW Document IX-2392-12　1-5　2012年7月

Effect of Welding Parameters of Friction Stir Welded High Nitrogen Steel 査読有り

Yutaka S. Sato, Kei Nakamura, Hiroyuki Kokawa

Proceedings of 9th International Conference on Trends in Welding Research, Chicago, Illinois, USA　in press　2012年6月

Material properties governing wear of Co-based alloy tool during friction stir welding of steels 査読有り

Masahiro Miyake, Yutaka S. Sato, Hiroyuki Kokawa, Yoshikazu Takaku, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan, C. Park, Satoshi Hirano

Proceedings of 9th International Friction Stir Welding Symposium, Huntsville, Alabama, USA　CD-R　2012年5月

EBSD study of recrystallization in friction-stirred superaustenitic stainless steel 査読有り

S. Mironov, Y.S. Sato, H. Kokawa

Proceedings of 9th International Friction Stir Welding Symposium, Huntsville, Alabama, USA　CD-R　2012年5月

Hardness and micro-texture in friction stir welds of a nanostructured oxide dispersion strengthened ferritic steel 査読有り

Wentuo Han, Shigeharu Ukai, Farong Wan, Yutaka Sato, Bin Leng, Hiroya Numata, Naoko Oono, Shigenari Hayashi, Qingxin Tang, Yoshito Sugino

Materials Transactions　53　(2)　390-394　2012年

DOI： 10.2320/matertrans.M2011226 　

ISSN：1345-9678

Evaluation of texture developed in high-temperature beta-phase during friction stir welding of Ti-6Al-4V 査読有り

S. Mironov, Y. S. Sato, H. Kokawa

MATERIALS INTEGRATION　508　106-111　2012年

DOI： 10.4028/www.scientific.net/KEM.508.106 　

ISSN：1013-9826

Texture Development during Friction Stir Welding of Magnesium Alloys 査読有り

Hiroyuki Kokawa, Yutaka S. Sato, Sergey Mironov

TEXTURES OF MATERIALS, PTS 1 AND 2　702-703　43-47　2012年

DOI： 10.4028/www.scientific.net/MSF.702-703.43 　

ISSN：0255-5476

High-speed TSV filling with molten solder 査読有り

Young-Ki Ko, Hiromichi T. Fujii, Yutaka S. Sato, Chang-Woo Lee, Sehoon Yoo

MICROELECTRONIC ENGINEERING　89　62-64　2012年1月

DOI： 10.1016/j.mee.2011.01.030 　

ISSN：0167-9317

Friction-Stir Welding of High-Softening-Temperature Materials using Cobalt-Based Alloy Tool 査読有り

Seung Hwan C. Park, Satoshi Hirano, Shinya Imano, Yutaka S. Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida

THERMEC 2011, PTS 1-4　706-709　996-+　2012年

DOI： 10.4028/www.scientific.net/MSF.706-709.996 　

ISSN：0255-5476

Fracture toughness of friction stir welded Invar 36 alloy at low temperature

Yue Zhao, Aiping Wu, Yutaka S. Sato, Hiroyuki Kokawa

Hanjie Xuebao/Transactions of the China Welding Institution　32　(12)　89-92　2011年12月

ISSN：0253-360X

Friction stir spot welding of single-crystal austenitic stainless steel 査読有り

J. Jeon, S. Mironov, Y. S. Sato, H. Kokawa, S. H. C. Park, S. Hirano

ACTA MATERIALIA　59　(20)　7439-7449　2011年12月

DOI： 10.1016/j.actamat.2011.09.013 　

ISSN：1359-6454

SYSTEMATIC EXAMINATION OF PRECIPITATION PHENOMENA ASSOCIATIED WITH HARDNESS AND CORROSION PROPERTIES IN FRICTION STIR WELDED ALUMINIUM ALLOY 2024 査読有り

Y. S. Sato, S. Kurihara, H. Kokawa

WELDING IN THE WORLD　55　(11-12)　39-47　2011年11月

DOI： 10.1007/BF03321541 　

ISSN：0043-2288

Microstructure and properties of friction stir welded high strength Fe-36 wt%Ni alloy 査読有り

Yue Zhao, Yutaka S. Sato, Hiroyuki Kokawa, Aiping Wu

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　528　(25-26)　7768-7773　2011年9月

DOI： 10.1016/j.msea.2011.06.082 　

ISSN：0921-5093

Structural response of superaustenitic stainless steel to friction stir welding 査読有り

S. Mironov, Y. S. Sato, H. Kokawa, H. Inoue, S. Tsuge

ACTA MATERIALIA　59　(14)　5472-5481　2011年8月

DOI： 10.1016/j.actamat.2011.05.021 　

ISSN：1359-6454

Microstructural Characterizations Following Friction Stir Welding of Dissimilar Alloys of Low- and High-Carbon Steels 査読有り

Don Hyun Choi, Byung Wook Ahn, Yun Mo Yeon, Seung Hwan C. Park, Yutaka S. Sato, Hiroyuki Kokawa, Seung Boo Jung

MATERIALS TRANSACTIONS　52　(7)　1500-1505　2011年7月

DOI： 10.2320/matertrans.M2010438 　

ISSN：1345-9678

eISSN：1347-5320

Grain boundary engineering of titanium-stabilized 321 austenitic stainless steel 査読有り

K. Kurihara, H. Kokawa, S. Sato, Y. S. Sato, H. T. Fujii, M. Kawai

JOURNAL OF MATERIALS SCIENCE　46　(12)　4270-4275　2011年6月

DOI： 10.1007/s10853-010-5244-3 　

ISSN：0022-2461

Microstructure and Mechanical Properties of Friction Stir Welded High-Strength Steel for Drilling Pipe 査読有り

Sangchul K. Lee, Yutaka S. Sato, Hiroyuki Kokawa, Jongsub Lee, Wonbae Lee, Minhyun Cho

Proceedings of the Twenty-first (2011) International Offshore and Polar Engineering Conference　IV　501-505　2011年6月

Friction Stir Welding of Titanium Alloy using a Cobalt-based Alloy Tool 査読有り

Seung Hwan, C. Park, Toshito Nagahama, Satoshi Hirano, Shinya Imano, Yutaka S. Sato, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida

Proceedings of the 12th World Conference on Titanium　1616-1620　2011年6月

Advanced TSV filling method with Sn alloy and its reliability 査読有り

Young-Ki Ko, Myong-Suk Kang, Hiroyuki Kokawa, Yutaka S. Sato, Sehoon Yoo, Chang-Woo Lee

2011 IEEE International 3D Systems Integration Conference, 3DIC 2011　2011年

DOI： 10.1109/3DIC.2012.6262988 　

DEFORMATION BEHAVIOR OF FRICTION STIR PROCESSED MAGNESIUM ALLOYS\ 査読有り

Q. Yang, S. Mironov, Y. S. Sato, K. Okamoto

MAGNESIUM TECHNOLOGY 2011　199-203　2011年

ISSN：1545-4150

Advanced Solder TSV Filling Technology Developed with Vacuum and Wave Soldering 査読有り

Young-Ki Ko, Hiromichi T. Fujii, Yutaka S. Sato, Chang-Woo Lee, Sehoon Yoo

2011 IEEE 61ST ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC)　2091-2095　2011年

ISSN：0569-5503

Tool Wear and Reactions in 304 Stainless Steel During Friction Stir Welding 査読有り

Yutaka S. Sato, Masahiro Muraguchi, Hiroyuki Kokawa

ADVANCED MATERIAL SCIENCE AND TECHNOLOGY, PTS 1 AND 2　675-677　731-+　2011年

DOI： 10.4028/www.scientific.net/MSF.675-677.731 　

ISSN：0255-5476

Microstructure and mechanical properties of Nd:YAG laser welded Invar 36 alloy 査読有り

Yue Zhao, Aiping Wu, Wei Yao, Zhimin Wang, Yutaka S. Sato, Hiroyuki Kokawa

ADVANCED MATERIAL SCIENCE AND TECHNOLOGY, PTS 1 AND 2　675-677　739-+　2011年

DOI： 10.4028/www.scientific.net/MSF.675-677.739 　

ISSN：0255-5476

DEVELOPMENT OF A COBALT-BASED ALLOY FSW TOOL FOR HIGH-SOFTENING-TEMPERATURE MATERIALS 査読有り

Yutaka S. Sato, Masahiro Miyake, Hiroyuki Kokawa, Toshihiro Omori, Kiyohito Ishida, Shinya Imano, Seung Hwan C. Park, Satoshi Hirano

FRICTION STIR WELDING AND PROCESSING VI　3-9　2011年

Microstructural evolution during friction stir welding of Ti-15V-3Cr-3Al-3Sn alloy 査読有り

S. Mironov, Y. S. Sato, H. Kokawa

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　527　(29-30)　7498-7504　2010年11月

DOI： 10.1016/j.msea.2010.08.074 　

ISSN：0921-5093

Microstructural Evolution during Friction Stir Welding of Ti-6Al-4V Alloy 査読有り

Sergey Mironov, Yutaka Sato, Hiroyuki Kokawa

STEEL RESEARCH INTERNATIONAL　81　(9)　1100-1103　2010年9月

ISSN：1611-3683

eISSN：1869-344X

Grain structure and microtexture in friction stir welded commercial purity titanium 査読有り

Y. Zhang, Y. S. Sato, H. Kokawa, S. H. C. Park, S. Hirano

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　15　(6)　500-505　2010年8月

DOI： 10.1179/136217110X12785889549624 　

ISSN：1362-1718

Systematic examination of precipitation phenomena associated with hardness and corrosion properties in friction stir welded aluminum alloy 2024 査読有り

S. Kurihara, Y.S. Sato, H. Kokawa

IIW Document IX-2339-10　1-14　2010年7月

Material flow during friction stir spot welding 査読有り

Q. Yang, S. Mironov, Y. S. Sato, K. Okamoto

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　527　(16-17)　4389-4398　2010年6月

DOI： 10.1016/j.msea.2010.03.082 　

ISSN：0921-5093

Effect of interfacial microstructure on lap shear strength of friction stir spot weld of aluminium alloy to magnesium alloy 招待有り 査読有り

Y. S. Sato, A. Shiota, H. Kokawa, K. Okamoto, Q. Yang, C. Kim

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　15　(4)　319-324　2010年5月

DOI： 10.1179/136217109X12568132624208 　

ISSN：1362-1718

Effect of fixed location variation in friction stir welding of steels with different carbon contents 招待有り 査読有り

D. -H. Choi, C. -Y. Lee, B. -W. Ahn, Y. -M. Yeon, S. -H. C. Park, Y. -S. Sato, H. Kokawa, S. -B. Jung

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　15　(4)　299-304　2010年5月

DOI： 10.1179/136217109X12577814486737 　

ISSN：1362-1718

eISSN：1743-2936

Precipitation phenomena in friction stir welded 6000-series aluminium alloy with paint-bake hardening response 査読有り

Y.S. Sato, N. Abe, U.F.H.R. Suhuddin, H. Kokawa

Proceedings of the 8th International Friction Stir Welding Symposium, Timmendorfer Strand, Germany　CD-ROM　2010年5月

Pin breakage during friction stir welding of Al alloy 査読有り

M. Miyake, Y.S. Sato, H. Kokawa

Proceedings of the 8th International Friction Stir Welding Symposium, Timmendorfer Strand, Germany　CD-ROM　2010年5月

Specific Character of Material Flow in Near-Surface Layer during Friction Stir Processing of AZ31 Magnesium Alloy 査読有り

S. Mironov, Q. Yang, H. Takahashi, I. Takahashi, K. Okamoto, Y. S. Sato, H. Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　41A　(4)　1016-1024　2010年4月

DOI： 10.1007/s11661-009-0158-x 　

ISSN：1073-5623

Grain structure and texture evolution during friction stir welding of thin 6016 aluminum alloy sheets 査読有り

U. F. H. R. Suhuddin, S. Mironov, Y. S. Sato, H. Kokawa

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　527　(7-8)　1962-1969　2010年3月

DOI： 10.1016/j.msea.2009.11.029 　

ISSN：0921-5093

Grain Structure Formation Ahead of Tool During Friction Stir Welding of AZ31 Magnesium Alloy 査読有り

U. Suhuddin, S. Mironov, H. Takahashi, Y. Sato, H. Kokawa, C. -W. Lee

TEXTURE AND ANISOTROPY OF POLYCRYSTALS III　160　313-+　2010年

DOI： 10.4028/www.scientific.net/SSP.160.313 　

ISSN：1012-0394

Friction Stir Spot Welding Phenomena in Al Alloy 6061 査読有り

Yutaka S. Sato, Mitsuo Fujimoto, Natsumi Abe, Hiroyuki Kokawa

THERMEC 2009, PTS 1-4　638-642　1243-+　2010年

DOI： 10.4028/www.scientific.net/MSF.638-642.1243 　

ISSN：0255-5476

Metallographic Study of Lapped FSW between Ductile Cast Iron and Austenite Type Stainless Steel 査読有り

Mitsuru Nakamura, Yu-ki Sawada, Yutaka S. Sato

THERMEC 2009, PTS 1-4　638-642　1197-+　2010年

DOI： 10.4028/www.scientific.net/MSF.638-642.1197 　

ISSN：0255-5476

Superplasticity of a Sc and Zr modified Al-6%Cu alloy subjected to ECAE 査読有り

I. Nikulin, R. Kaibyshev, S. Mironov, Y. S. Sato, H. Kokawa, Y. Motohashi

THERMEC 2009, PTS 1-4　638-642　291-+　2010年

DOI： 10.4028/www.scientific.net/MSF.638-642.291 　

ISSN：0255-5476

Improvement of Transpassive Intergranular Corrosion Resistance of 304 Austenitic Stainless Steel by Thermomechanical Processing for Twin-induced Grain Boundary Engineering 査読有り

Wei Zhong Jin, Hiroyuki Kokawa, Zhan Jie Wang, Yutaka S. Sato, Nobuyoshi Hara

ISIJ INTERNATIONAL　50　(3)　476-481　2010年

DOI： 10.2355/isijinternational.50.476 　

ISSN：0915-1559

Microstructural Evolution of DP980 Steel during Friction Bit Joining 査読有り

T. Huang, Y. S. Sato, H. Kokawa, M. P. Miles, K. Kohkonen, B. Siemssen, R. J. Steel, S. Packer

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　40A　(12)　2994-3000　2009年12月

DOI： 10.1007/s11661-009-0016-x 　

ISSN：1073-5623

Grain Refinement by Friction Stir Processing 査読有り

S. Mironov, K. Masaki, Y.S. Sato, H. Kokawa

Proceedings of the 18th Conference on Processing and Fabrication of Advanced Materials (PFAM XVIII), edited by M. Niinomi, M. Morinaga, M. Nakai, N. Bhatnagar, T.S. Srivatsan, JSPS, December 12-14, 2009, Sendai　1973-1980　2009年12月

Grain Boundary Engineering of Austenitic Stainless Steels 査読有り

H. Kokawa, M. Michiuchi, M. Shimada, Y.S. Sato, Z.J. Wang

Proceedings of the 18th Conference on Processing and Fabrication of Advanced Materials (PFAM XVIII), edited by M. Niinomi, M. Morinaga, M. Nakai, N. Bhatnagar, T.S. Srivatsan, JSPS, December 12-14, 2009, Sendai　517-526　2009年12月

Grain structure evolution during friction-stir welding of AZ31 magnesium alloy 査読有り

U. F. H. R. Suhuddin, S. Mironov, Y. S. Sato, H. Kokawa, C. -W. Lee

ACTA MATERIALIA　57　(18)　5406-5418　2009年10月

DOI： 10.1016/j.actamat.2009.07.041 　

ISSN：1359-6454

Development of grain structure during friction stir welding of pure titanium 査読有り

S. Mironov, Y. S. Sato, H. Kokawa

ACTA MATERIALIA　57　(15)　4519-4528　2009年9月

DOI： 10.1016/j.actamat.2009.06.020 　

ISSN：1359-6454

Microstructural Characterization of High-Strength Steel Lap Joint Produced by Friction Spot Joining 査読有り

R. Ohashi, M. Fujimoto, S. Mironov, Y. S. Sato, H. Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　40A　(9)　2033-2035　2009年9月

DOI： 10.1007/s11661-009-9892-3 　

ISSN：1073-5623

Reactions during friction stir welding of 304 stainless steel using several welding tool materials 査読有り

Y.S. Sato, M. Muraguchi, H. Kokawa

Proceedings of Asia Steel 2009　2009年5月

Effect of contamination on microstructure in friction stir spot welded DP590 steel 招待有り 査読有り

R. Ohashi, M. Fujimoto, S. Mironov, Y. S. Sato, H. Kokawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　14　(3)　221-227　2009年4月

DOI： 10.1179/136217108X388642 　

ISSN：1362-1718

Evaluation of microstructure and properties in friction stir welded superaustenitic stainless steel 招待有り 査読有り

Y. S. Sato, N. Harayama, H. Kokawa, H. Inoue, Y. Tadokoro, S. Tsuge

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　14　(3)　202-209　2009年4月

DOI： 10.1179/136217108X386518 　

ISSN：1362-1718

Boride Formation Induced by pcBN Tool Wear in Friction-Stir-Welded Stainless Steels 査読有り

Seung Hwan C. Park, Yutaka S. Sato, Hiroyuki Kokawa, Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　40A　(3)　625-636　2009年3月

DOI： 10.1007/s11661-008-9709-9 　

ISSN：1073-5623

EFFECT OF TEXTURE ON FRACTURE LIMIT STRAIN IN FRICTION STIR PROCESSED AZ31B MG ALLOY 招待有り 査読有り

Yutaka S. Sato, Akihiro Sugimoto, Hiroyuki Kokawa, Chang-Woo Lee

MATERIALS PROCESSING AND TEXTURE　200　43-52　2009年

ISSN：1042-1122

Solid state spot joining of sheet materials using consumable bit 査読有り

M. P. Miles, K. Kohkonen, S. Packer, R. Steel, B. Siemssen, Y. S. Sato

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　14　(1)　72-77　2009年1月

DOI： 10.1179/136217108X341193 　

ISSN：1362-1718

MICROSTRUCTURE AND PROPERTIES OF FRICTION STIR WELDED 1.3WT% N CONTAINING STEEL 招待有り 査読有り

Yutaka S. Sato, Kei Nakamura, Hiroyuki Kokawa, Shuji Narita, Tetsuya Shimizu

FRICTION STIR WELDING AND PROCESSING V　67-+　2009年

Microstructure and Mechanical Properties of Friction Stir Welded Ti-15V-3Al-3Cr-3Sn Alloy 査読有り

Y. Zhang, Y. S. Sato, H. Kokawa, S. H. C. Park, S. Hirano

TRENDS IN WELDING RESEARCH　413-+　2009年

DOI： 10.1361/cp2008twr413 　

Grain Boundary Engineering of Austenitic Stainless Steels 査読有り

H. Kokawa, M. Michiuchi, M. Shimada, Z. J. Wang, Y. S. Sato

TRENDS IN WELDING RESEARCH　11-16　2009年

DOI： 10.1361/cp2008twr011 　

Friction spot joining of high strength steel sheets for automotives 査読有り

Ryoji Ohashi, Mitsuo Fujimoto, Sergey Mironov, Yutaka S. Sato, Hiroyuki Kokawa

Welding in the World　53　(5-6)　23-27　2009年

DOI： 10.1007/BF03266711 　

ISSN：0043-2288

Microstructural analysis of stir zone of Al alloy produced by friction stir spot welding 査読有り

M. Fujimoto, S. Koga, N. Abe, Y. S. Sato, H. Kokawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　13　(7)　663-670　2008年10月

DOI： 10.1179/136217108X347601 　

ISSN：1362-1718

Crystallography of transformed beta microstructure in friction stir welded Ti-6Al-4V alloy 査読有り

S. Mironov, Y. Zhang, Y. S. Sato, H. Kokawa

SCRIPTA MATERIALIA　59　(5)　511-514　2008年9月

DOI： 10.1016/j.scriptamat.2008.04.038 　

ISSN：1359-6462

Stir zone microstructure of commercial purity titanium friction stir welded using pcBN tool 招待有り 査読有り

Yu Zhang, Yutaka S. Sato, Hiroyuki Kokawa, Seung Hwan C. Park, Satoshi Hirano

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　488　(1-2)　25-30　2008年8月

DOI： 10.1016/j.msea.2007.10.062 　

ISSN：0921-5093

Development of grain structure in beta-phase field during friction stir welding of Ti-6Al-4V alloy 査読有り

S. Mironov, Y. Zhang, Y. S. Sato, H. Kokawa

SCRIPTA MATERIALIA　59　(1)　27-30　2008年7月

DOI： 10.1016/j.scriptamat.2008.02.014 　

ISSN：1359-6462

Microstructural evolution during friction stir-processing of pure iron 査読有り

S. Mironov, Y. S. Sato, H. Kokawa

ACTA MATERIALIA　56　(11)　2602-2614　2008年6月

DOI： 10.1016/j.actamat.2008.01.040 　

ISSN：1359-6454

Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds 査読有り

Yu Zhang, Yutaka S. Sato, Hiroyuki Kokawa, Seung Hwan C. Park, Satoshi Hirano

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　485　(1-2)　448-455　2008年6月

DOI： 10.1016/j.msea.2007.08.051 　

ISSN：0921-5093

Friction Spot Joining of High Strength Steel Sheets for Automotives 査読有り

R. Ohashi, M. Fujimoto, S. Mironov, Y.S. Sato, H. Kokawa

IIW Document III-1488-08　1-6　2008年6月

Reaction in 304 austenitic stainless steel during friction stir welding using WC-based alloy tool 査読有り

Y.S. Sato, M. Muraguchi, H. Kokawa

IIW Document IX-2272-08　1-9　2008年6月

Microstructure and mechanical properties of friction stir spot welded AZ31 Mg alloy 査読有り

Q. Yang, S. Mironov, Y.S. Sato, K. Okamoto

Proceedings of the 7th International Friction Stir Welding Symposium　CD-ROM　2008年5月

Solid-state phase transformation of DP-590 steel during friction spot joining 査読有り

S. Mironov, R. Ohashi, M. Fujimoto, Y.S. Sato, H. Kokawa

Proceedings of the 7th International Friction Stir Welding Symposium　CD-ROM　2008年5月

Effect of microstructure on properties of friction stir welded Inconel Alloy 600 査読有り

Y. S. Sato, P. Arkom, H. Kokawa, T. W. Nelson, R. J. Steel

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　477　(1-2)　250-258　2008年3月

DOI： 10.1016/j.msea.2007.07.002 　

ISSN：0921-5093

Experimental simulation of recrystallized microstructure in friction stir welded Al alloy using a plane-strain compression test 招待有り 査読有り

Kunitaka Masaki, Yutaka S. Sato, Masakatsu Maeda, Hiroyuki Kokawa

SCRIPTA MATERIALIA　58　(5)　355-360　2008年3月

DOI： 10.1016/j.scriptamat.2007.09.056 　

ISSN：1359-6462

Reassessment of the effects of laser surface melting on IGC of SUS 304 査読有り

Sen Yang, Zhanjie Wang, Hiroyuki Kokawa, Yutaka S. Sato

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　474　(1-2)　112-119　2008年2月

DOI： 10.1016/j.msea.2007.03.103 　

ISSN：0921-5093

Effect of twin-induced grain boundary engineering on intergranular corrosion propagation in 304 austenitic stainless steel 査読有り

S. Sato, M. Miyagi, H. Kokawa, Z.J. Wang, Y.S. Sato

Proceedings of the 8th International Conference on Trends in Welding Research　in press　2008年

Characteristics of microstructure in ultrahigh carbon steel produced during friction stir welding 査読有り

Yutaka S. Sato, Hideaki Yamanoi, Hiroyuki Kokawa, Tadashi Furuhara

ISIJ INTERNATIONAL　48　(1)　71-76　2008年

DOI： 10.2355/isijinternational.48.71 　

ISSN：0915-1559

摩擦攪拌点接合で得られたアルミニウム合金継手における塑性流動に関する検討 査読有り

藤本光生, 古賀信次, 阿部奈津美, 佐藤 裕, 粉川博之

溶接学会論文集　26　(1)　67-73　2008年

DOI： 10.2207/qjjws.26.67 　

ISSN：0288-4771

Experimental estimation of strain rate during FSW of Al-alloy using plane-strain compression 査読有り

Kunitaka Masaki, Yutaka S. Sato, Masakatsu Maeda, Hiroyuki Kokawa

ADVANCED WELDING AND MICRO JOINING / PACKAGING FOR THE 21ST CENTURY　580-582　299-+　2008年

ISSN：0255-5476

Microstructural evolution in 304 austenitic stainless steel during friction stir welding 査読有り

Hiroyuki Kokawa, Seung Hwan C. Park, Yutaka S. Sato, Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki

ADVANCED WELDING AND MICRO JOINING / PACKAGING FOR THE 21ST CENTURY　580-582　9-+　2008年

ISSN：0255-5476

摩擦撹拌点接合で得られたアルミニウム合金重ね継手の引張せん断強度に及ぼす接合時間とねじの影響 査読有り

藤本光生, 渡辺大介, 阿部奈津美, 佐藤裕, 粉川博之

溶接学会論文集　26　(4)　253-258　2008年

DOI： 10.2207/qjjws.26.253 　

ISSN：0288-4771

Improvement of intergranular stress corrosion crack susceptibility of austenite stainless steel through grain boundary engineering 査読有り

Weizhong Jin, Sen Yang, Hiroyuki Kokawa, Zhanjie Wang, Yutaka S. Sato

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY　23　(6)　785-789　2007年11月

ISSN：1005-0302

Multibody Joining: A New Method for Spot Joining of Sheet Materials 査読有り

M.P. Miles, K. Kohkonen, B. Siemssen, R. Steel, S. Packer, Y.S. Sato

Proceedings of MS&T’07　227-234　2007年11月

Arrest of weld-decay in 304 austenitic stainless steel by twin-induced grain boundary engineering 査読有り

H. Kokawa, M. Shimada, M. Michluchi, Z. J. Wang, Y. S. Sato

ACTA MATERIALIA　55　(16)　5401-5407　2007年9月

DOI： 10.1016/j.actamat.2007.06.005 　

ISSN：1359-6454

Microstructural evolution of ultrahigh carbon steel during friction stir welding 査読有り

Y. S. Sato, H. Yamanoi, H. Kokawa, T. Furuhara

SCRIPTA MATERIALIA　57　(6)　557-560　2007年9月

DOI： 10.1016/j.scriptamat.2007.04.050 　

ISSN：1359-6462

Grain growth phenomena in friction stir welded 1100 Al during post-weld heat treatment 招待有り 査読有り

Y. S. Sato, H. Watanabe, H. Kokawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　12　(4)　318-323　2007年7月

DOI： 10.1179/174329307X197575 　

ISSN：1362-1718

Grain boundary engineering of 304 austenitic stainless steel by laser surface melting and annealing 査読有り

Sen Yang, Zhan Jie Wang, Hiroyuki Kokawa, Yutaka S. Sato

JOURNAL OF MATERIALS SCIENCE　42　(3)　847-853　2007年2月

DOI： 10.1007/s10853-006-0063-2 　

ISSN：0022-2461

Microstructure of friction-stir-welded high-nitrogen stainless steel 招待有り 査読有り

S. H. C. Park, Y. S. Sato, H. Kokawa, K. Okamota, S. Hirano, M. Inagaki

THERMEC 2006, PTS 1-5　539-543　3757-+　2007年

ISSN：0255-5476

Enhancement of formability in magnesium alloy AZ31B via friction stir processing 招待有り 査読有り

Y. S. Sato, A. Sasaki, A. Sugimoto, A. Honda, H. Kokawa

THERMEC 2006, PTS 1-5　539-543　3775-+　2007年

ISSN：0255-5476

Grain boundary engineering of high-nitrogen austenitic stainless steel 招待有り 査読有り

H. Kokawa, W. Z. Jin, Z. J. Wang, M. Michiuchi, Y. S. Sato, W. Dong, Y. Katada

THERMEC 2006, PTS 1-5　539-543　4962-+　2007年

ISSN：0255-5476

Microstructure and properties of friction stir welded 304 stainless steel using W-BASED alloy tool 招待有り 査読有り

Yutaka S. Sato, Masahiro Muraguchi, Hiroyuki Kokawa

FRICTION STIR WELDING AND PROCESSING IV　261-+　2007年

Microstructural factors governing mechanical properties in friction stir welds 査読有り

Yutaka S. Sato, Hiroyuki Kokawa

MECHANICAL BEHAVIOR OF MATERIALS X, PTS 1AND 2　345-346　1493-+　2007年

ISSN：1013-9826

摩擦攪拌点接合で得られた6061アルミニウム合金攪拌領域の組織学的検討 査読有り

藤本光生, 古賀信次, 阿倍奈津美, 佐藤 裕, 粉川博之

溶接学会論文集　25　(4)　553-559　2007年

DOI： 10.2207/qjjws.25.553 　

ISSN：0288-4771

Twin-induced grain boundary engineering for 316 austenitic stainless steel 査読有り

M. Michiuchi, H. Kokawa, Z. J. Wang, Y. S. Sato, K. Sakai

ACTA MATERIALIA　54　(19)　5179-5184　2006年11月

DOI： 10.1016/j.actamat.2006.06.030 　

ISSN：1359-6454

Microstructural characteristics of dissimilar butt friction stir welds of AA7075 and AA2024 査読有り

Y.S. Sato, Y. Kurihara, H. Kokawa

Proceedings of 6th International FSW Symposim, St-Sauveur, Canada　CD-ROM　2006年10月

Ultraprecision machining characteristics of poly-crystalline germanium 査読有り

Jiwang Yan, Yasunori Takahashi, Jun'ichi Tamaki, Akihiko Kubo, Tsunemoto Kuriyagawa, Yutaka Sato

JSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing　49　(1)　63-69　2006年9月15日

DOI： 10.1299/jsmec.49.63 　

ISSN：1344-7653 1347-538X

Effect of microstructure on fracture limit strain of pseudo-plane strain deformation in friction stir welded Al alloy 5052

Yutaka Sato, Yusuke Sugiura, Hiroyuki Kokawa

Keikinzoku Yosetsu/Journal of Light Metal Welding and Construction　44　(5)　15-22　2006年5月

ISSN：0368-5306

AA5052摩擦攪拌接合部の擬平面ひずみ変形における破断限界ひずみに及ぼすミクロ組織の影響 招待有り 査読有り

佐藤 裕, 杉浦裕介, 粉川博之

軽金属溶接　44　(5)　195-202　2006年5月

ISSN：0368-5306

Forming property and microstructure in dissimilar thickness friction stir weld of Al alloy 5052 査読有り

Y. S. Sato, F. Yamashita, Y. Sugiura, H. Kokawa

SAE Technical Papers　2006-01-1393　2006年

DOI： 10.4271/2006-01-1393 　

Microstructural evolution during friction stir welding of ultrafine grained Al alloys 招待有り 査読有り

YS Sato, M Urata, Y Kurihara, SHC Park, H Kokawa, K Ikeda, N Tsuji

NANOMATERIALS BY SEVERE PLASTIC DEFORMATION　503-504　169-174　2006年

ISSN：0255-5476

Effect of threads on tool in friction stir welding of aluminum alloys 査読有り

H Fujii, L Cui, M Maeda, YS Sato, K Nogi

ADVANCED STRUCTURAL AND FUNCTIONAL MATERIALS DESIGN, PROCEEDINGS　512　389-394　2006年

DOI： 10.4028/0-87849-996-2.389 　

ISSN：0255-5476

Effect of Microstructure on Postweld Formability in Friction Stir Welded Al Alloy 5052 査読有り

Y. S. Sato, Y. Sugiura, Y. Shoji, S. H. C. Park, H. Kokawa, K. Ikeda

TRENDS IN WELDING RESEARCH, PROCEEDINGS　7　387-391　2006年

Development of Intergranular Corrosion Resistant 316 Austenitic Stainless Steel by Grain Boundary Engineering 査読有り

M. Michiuchi, H. Kokawa, Z. J. Wang, Y. S. Sato, K. Sakai

TRENDS IN WELDING RESEARCH, PROCEEDINGS　7　935-938　2006年

Ultraprecision Machining Characteristics of Poly-crystalline Germanium 査読有り

J. Yan, Y. Takahashi, J. Tamaki, A. Kubo, T. Kuriyagawa, Y. Sato

Proceedings of the 3rd International Conference on Leading Edge Manufacturing in 21st Century　1035-1040　2005年10月19日

Nitrogen desorption by high-nitrogen steel weld metal during CO2 laser welding 査読有り

W Dong, H Kokawa, S Tsukamoto, YS Sato

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE　36　(5)　677-681　2005年10月

DOI： 10.1007/s11663-005-0058-4 　

ISSN：1073-5615

Microstructural Evolution during Friction Stir Welding of Ultrafine Grained Al Alloys 査読有り

Y.S. Sato, M. Urata, Y. Kurihara, S.H.C. Park, H. Kokawa, K. Ikeda, N. Tsuji

Material Science Forum　503-504　169-174　2005年9月

Microstructural characterisation of stir zone containing residual ferrite in friction stir welded 304 austenitic stainless steel 査読有り

SHC Park, YS Sato, H Kokawa, K Okamoto, S Hirano, M Inagaki

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　10　(5)　550-556　2005年9月

DOI： 10.1179/174329305X46691 　

ISSN：1362-1718

Microstructural Evolution in Austenitic Stainless Steels during Friction Stir Welding 査読有り

Hiroyuki Kokawa, Seung Hwan, C. Park, Yutaka S. Sato, Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki

Proceedings of the 8th Inter-University Research Seminar (IURS) on Science and Technology of Welding and Joining, Frontiers of Welding and Joining - Processes　15-16　135-147　2005年8月

Microstructure and mechanical properties of friction stir welded SAF 2507 super duplex stainless steel 査読有り

YS Sato, TW Nelson, CJ Sterling, RJ Steel, CO Pettersson

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　397　(1-2)　376-384　2005年4月

DOI： 10.1016/j.msea.2005.02.054 　

ISSN：0921-5093

Novel production for highly formable Mg alloy plate 査読有り

Y. S. Sato, S. H C Park, A. Matsunaga, A. Honda, H. Kokawa

Journal of Materials Science　40　(3)　637-642　2005年2月

DOI： 10.1007/s10853-005-6301-1 　

ISSN：0022-2461

Microstructures in friction stir welded 304 austenitic stainless steel 査読有り

H. Kokawa, S. H.C. Park, Y. S. Sato, K. Okamoto, S. Hirano, M. Inagaki

Welding in the World　49　(3-4)　34-40　2005年

DOI： 10.1007/BF03266473 　

ISSN：0043-2288

Relationship between bend property and oxide array in the root of a friction stir welded Al alloy 査読有り

Y.S. Sato, H. Takauchi, S.H.C. Park, H. Kokawa

Proceedings of the 11th International Symposium on Plasticity and its Current Application (Plasticity 2005)　CD-ROM　2005年1月

Properties and microstructure of friction stir welded inconel alloy 600 査読有り

YS Sato, P Arkom, SHC Park, H Kokawa, TW Nelson, RJ Steel

PROCEEDINGS OF THE FIFTEENTH (2005) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4　IV　13-17　2005年

ISSN：1098-6189

Microstructure and mechanical properties of friction stir welded 430 stainless steel 査読有り

SHC Park, T Kumagai, YS Sato, H Kokawa

PROCEEDINGS OF THE FIFTEENTH (2005) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4　IV　6-12　2005年

ISSN：1098-6189

Grain growth in friction stir welded Al alloy 1100 during postweld heat treatment

Yutaka S. Sato, Hitomi Watanabe, Seung Hwan, C. Park, Hiroyuki Kokawa

Proceedings of the 5th International Friction Stir Welding Symposium　CD-ROM　2004年9月

Corrosion resistance of friction stir welded 304 stainless steel 査読有り

SHC Park, YS Sato, H Kokawa, K Okamoto, S Hirano, M Inagaki

SCRIPTA MATERIALIA　51　(2)　101-105　2004年7月

DOI： 10.1016/j.scriptamat.2004.04.001 　

ISSN：1359-6462

Microstructures in friction stir welded 304 austenitic stainless steel 査読有り

Hiroyuki Kokawa, Seung Hwan, C. Park, Yutaka S. Sato, Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki

IIW Document IX-2093-04　1-5　2004年7月

Friction Stir Welding of Equal Channel Angular Pressed Al Alloys 査読有り

Y.S. Sato, M. Urata, H. Kokawa, K. Ikeda

IIW Document IX-2103-04　1-8　2004年7月

Microstructural evolution during dissimilar friction stir welding of Al and Mg alloys

M. Michiuchi, Seung Hwan, C. Park, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of IIW Pre-Assembly Meeting on FSW in Nagoya 2004　117-125　2004年7月

Friction stir welding of an accumulative roll-bonded Al alloy 1100 having ultrafine grains

佐藤 裕, 他

Proceedings of IIW Pre-Assembly Meeting on FSW in Nagoya 2004　127-134　2004年7月

Corrosion properties in friction stir welded 304 austenitic stainless steel

S.H.C. Park, Y.S. Sato, H. Kokawa, K. Okamoto, S. Hirano, M. Inagaki

Proceedings of IIW Pre-Assembly Meeting on FSW in Nagoya 2004　52　(4)　135-142　2004年7月

ISSN：0043-2318

Corrosion resistance of friction stir welded 304 stainless steel

SHC Park, YS Sato, H Kokawa, K Okamoto, S Hirano, M Inagaki

SCRIPTA MATERIALIA　51　(2)　101-105　2004年7月

DOI： 10.1016/j.scriptamat.2004.04.001 　

ISSN：1359-6462

Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys 査読有り

YS Sato, SHC Park, M Michiuchi, H Kokawa

SCRIPTA MATERIALIA　50　(9)　1233-1236　2004年5月

DOI： 10.1016/j.scriptamat.2004.02.002 　

ISSN：1359-6462

Post-weld formability of friction stir welded Al alloy 5052 査読有り

YS Sato, Y Sugiura, Y Shoji, SHC Park, H Kokawa, K Ikeda

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　369　(1-2)　138-143　2004年3月

DOI： 10.1016/j.msea.2003.11.035 　

ISSN：0921-5093

FIB-assisted TEM study of an oxide array in the root of a friction stir welded aluminium alloy 査読有り

YS Sato, F Yamashita, Y Sugiura, SHC Park, H Kokawa

SCRIPTA MATERIALIA　50　(3)　365-369　2004年2月

DOI： 10.1016/j.scriptamat.2003.10.008 　

ISSN：1359-6462

Effect of microstructure on corrosion of friction stir welded 304 stainless steel

Seung Hwan, C. Park, Yutaka S. Sato, Hiroyuki Kokawa, Kazutaka Okamoto, Satoshi Hirano

Proceedings of the 5th International Symposium on Friction Stir Welding, Metz, France　5　CDR　2004年

Suppression of weld decay of austenitic stainless steel by grain boundary engineering

Hiroyuki Kokawa, Masayuki Shimada, Masato Michiuchi, Wei Zhong Jin, Zhan Jie Wang, Yutaka S. Sato

Proceedings of Finnish-German-Japanese Seminar on Mechanical and Metallurgical Approaches to New Joining Process, Awajishima, Hyogo, Japan　196-203　2004年

Interlayer growth at interfaces of Ti/Al-1%Mn, Ti/Al-4.6%Mg and Ti/pure Al friction weld joints by post-weld heat treatment 査読有り

A Fuji, K Ikeuchi, YS Sato, H Kokawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　9　(6)　507-512　2004年

DOI： 10.1179/136217104225021797 　

ISSN：1362-1718

Microstructural evolution of 304 austenitic stainless steel during friction stir welding 査読有り

H Kokawa, SHC Park, YS Sato, K Okamoto, S Hirano, M Inagaki

PROCEEDINGS OF THE FOURTEENTH (2004) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4　IV　73-77　2004年

ISSN：1098-6189

Friction stir welding of ultrafine grained Al alloy 1100 produced by accumulative roll-bonding 査読有り

YS Sato, Y Kurihara, SHC Park, H Kokawa, N Tsuji

SCRIPTA MATERIALIA　50　(1)　57-60　2004年1月

DOI： 10.1016/j.scriptamat.2003.09.037 　

ISSN：1359-6462

Mechanism governing nitrogen absorption by steel weld metal during laser welding 査読有り

Wei Dong, Hiroyuki Kokawa, Susumu Tsukamoto, Yutaka S. Sato, Makoto Ogawa

Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science　35　(2)　331-338　2004年

DOI： 10.1007/s11663-004-0033-5 　

ISSN：1073-5615

Grain boundary engineering for intergranular corrosion resistant austenitic stainless steel 査読有り

H Kokawa, M Shimada, ZJ Wang, YS Sato, M Michiuchi

ADVANCES IN FRACTURE AND FAILURE PREVENTION, PTS 1 AND 2　261-263　1005-1010　2004年

ISSN：1013-9826

Rapid formation of the sigma phase in 304 stainless steel during friction stir welding 査読有り

SHC Park, YS Sato, H Kokawa, K Okamoto, S Hirano, M Inagaki

SCRIPTA MATERIALIA　49　(12)　1175-1180　2003年12月

DOI： 10.1016/j.scriptamat.2003.08.022 　

ISSN：1359-6462

Microstructural evolution and its effect on Hall-Petch relationship in friction stir welding of thixomolded Mg alloy AZ91D 査読有り

SHC Park, YS Sato, H Kokawa

JOURNAL OF MATERIALS SCIENCE　38　(21)　4379-4383　2003年11月

DOI： 10.1023/A:1026351619636 　

ISSN：0022-2461

Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloys 査読有り

YS Sato, M Urata, H Kokawa, K Ikeda

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING　354　(1-2)　298-305　2003年8月

DOI： 10.1016/S0921-5093(03)00008-X 　

ISSN：0921-5093

Suppression of chromium depletion by grain boundary structural change during twin-induced grain boundary engineering of 304 stainless steel 査読有り

HY Bi, H Kokawa, ZJ Wang, M Shimada, YS Sato

SCRIPTA MATERIALIA　49　(3)　219-223　2003年8月

DOI： 10.1016/S1359-6462(03)00261-6 　

ISSN：1359-6462

Effect of micro-texture on fracture location in friction stir weld of Mg alloy AZ61 during tensile test 査読有り

SHC Park, YS Sato, H Kokawa

SCRIPTA MATERIALIA　49　(2)　161-166　2003年7月

DOI： 10.1016/S1359-6462(03)00210-0 　

ISSN：1359-6462

マグネシウム合金FSW部の機械的特性とミクロ組織 査読有り

朴 勝煥, 佐藤 裕, 粉川博之

溶接法ガイドブック５ 「溶接プロセスの高効率化」　II-386-II-390　2003年6月

Texture effects on tensile properties in friction stir weld of a magnesium alloy AZ31 査読有り

Seung Hwan, C. Park, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of the 4th International Symposium on Friction Stir Welding, Park City, Utah, USA　CDR　2003年5月

DOI： 10.1007/s11661-003-0228-4 　

Metallurgical and mechanical properties of friction stir welded stainless steels 査読有り

Kazutaka Okamoto, Satoshi Hirano, Masahisa Inagaki, Seung Hwan, C. Park, Yutaka S. Sato, Hiroyuki Kokawa, Tracy W. Nelson, Carl D. Sorensen

Proceedings of the 4th International Symposium on Friction Stir Welding, Park City, Utah, USA　(10-11)　CDR-203　2003年5月

ISSN：0005-111X

Hardness distribution and microstructure in friction stir weld of Al alloy 5052 査読有り

Yutaka S. Sato, Yusuke Sugiura, Hiroyuki Kokawa

Proceedings of the 4th International Symposium on Friction Stir Welding, Park City, Utah　CDR　2003年5月

Basal plane texture and flow pattern in friction stir weld of a magnesium alloy 査読有り

SHC Park, YS Sato, H Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　34A　(4)　987-994　2003年4月

DOI： 10.1007/s11661-003-0228-4 　

ISSN：1073-5623

Nitrogen absorption by iron and stainless steels during CO2 laser welding 査読有り

W Dong, H Kokawa, YS Sato, S Tsukamoto

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE　34　(1)　75-82　2003年2月

DOI： 10.1007/s11663-003-0057-2 　

ISSN：1073-5615

Effect of twin-induced grain boundary engineering on intergranular corrosion in austenitic stainless steel 査読有り

M Shimada, H Kokawa, ZJ Wang, YS Sato

TRENDS IN WELDING RESEARCH, PROCEEDINGS　93-98　2003年

Reproduction of ultra-fine grains in equal channel angular pressed Al alloy 5083 by friction stir process 査読有り

YS Sato, M Urata, H Kokawa, K Ikeda

TRENDS IN WELDING RESEARCH, PROCEEDINGS　262-266　2003年

Improvement of mechanical properties in thixomolded Mg alloy AZ91D by friction stir welding 査読有り

SHC Park, YS Sato, H Kokawa, T Tsukeda

TRENDS IN WELDING RESEARCH, PROCEEDINGS　267-272　2003年

Effect of friction stirring on microstructure in equal channel angular pressed aluminum alloys 査読有り

YS Sato, M Urata, H Kokawa, K Ikeda

THERMEC'2003, PTS 1-5　426-4　2947-2952　2003年

ISSN：0255-5476

Recovery retardation in equal channel angular pressed Al-Zr alloy during friction stir welding 査読有り

YS Sato, M Urata, H Kokawa, K Ikeda

SCRIPTA MATERIALIA　47　(12)　869-873　2002年12月

DOI： 10.1016/S1359-6462(02)00385-8 　

ISSN：1359-6462

Intergranular Corrosion-Resistant Stainless Steel by Twin-Induced Grain Boundary Engineering 査読有り

Hiroyuki Kokawa, Masayuki Shimada, Zhan Jie Wang, Yutaka S. Sato

Annales de Chimie, Science des Materaix　27　(Suppl.1)　S315-S325　2002年12月

Dissimilar Friction-Stir Welding of Al Alloy 1050 and Mg Alloy AZ31 査読有り

Seung Hwan, C. Park, Masato Michiuchi, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of International Welding/Joining Conference-Korea 2002 on Intelligent Technology in Welding and Joining for the 21st Century, Gyeongju, Korea　534-538　2002年10月

Intergranular Corrosion-Resistant Stainless Steel by Grain Boundary Engineering 査読有り

Hiroyuki Kokawa, Masayuki Shimada, Zhan Jie Wang, Yutaka S. Sato

Proceedings of International Welding/Joining Conference-Korea 2002 on Intelligent Technology in Welding and Joining for the 21st Century, Gyeongju, Korea　250-254　2002年10月

Effect of Microstructure on Mechanical Properties in Friction Stir Welded Cast A356 Aluminum Alloy 査読有り

Yutaka S. Sato, Mitsunori Urata, Takayasu Kaneko, Hiroyuki Kokawa

Proceedings of International Welding/Joining Conference-Korea 2002 on Intelligent Technology in Welding and Joining for the 21st Century, Gyeongju, Korea　493-498　2002年10月

Ductile-brittle transition of steel electron beam weld metal in small punch test 査読有り

Gai, X, YS Sato, H Kokawa, K Ichikawa

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　7　(4)　204-211　2002年8月

DOI： 10.1179/136217102225004275 　

ISSN：1362-1718

Production of Intergranular Corrosion-Resistant Stainless Steel by Twin-Induced Grain Boundary Engineering 査読有り

Hiroyuki Kokawa, Masayuki Shimada, Zhan Jie Wang, Yutaka S. Sato

Proceedings of the 7th Inter-University Research Seminar on Materials Science, Welding, Joining and Allied Processes, Bratislava, Slovakia, Edited by P. Orszagh, ATP Technika　5-11　2002年6月

Optimization of grain boundary character distribution for intergranular corrosion resistant 304 stainless steel by twin-induced grain boundary engineering 査読有り

M. Shimada, H. Kokawa, Z. J. Wang, Y. S. Sato, I. Karibe

Acta Materialia　50　(9)　2331-2341　2002年5月24日

DOI： 10.1016/S1359-6454(02)00064-2 　

ISSN：1359-6454

Parameters controlling microstructure and hardness during friction-stir welding of precipitation-hardenable aluminum alloy 6063 査読有り

YS Sato, M Urata, H Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　33　(3)　625-635　2002年3月

DOI： 10.1007/s11661-002-0124-3 　

ISSN：1073-5623

Distribution of tensile property and microstructure in friction stir weld of 6063 aluminum 査読有り

YS Sato, H Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　32　(12)　3023-3031　2001年12月

DOI： 10.1007/s11661-001-0177-8 　

ISSN：1073-5623

Microstructural factors governing hardness in friction-stir welds of solid-solution-hardened Al alloys 査読有り

YS Sato, SHC Park, H Kokawa

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　32　(12)　3033-3042　2001年12月

DOI： 10.1007/s11661-001-0178-7 　

ISSN：1073-5623

Effect of Friction Stir Processing on Microstructure and Hardness Profile of Equal Channel Angular Pressed Aluminum Alloy 1050 査読有り

Yutaka S. Sato, Mitsunori Urata, Hiroyuki Kokawa, Keisuke Ikeda

Proceedings of the 7th International Welding Symposium on Today and Tomorrow in Science and Technology of Welding and Joining, JWS, Kobe, Japan　1　633-638　2001年11月

Mechanical Properties and Microstructure in Friction-Stir-Weld of Magnesium Alloy AZ61 査読有り

Seung Hwan, C. Park, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of the 7th International Welding Symposium on Today and Tomorrow in Science and Technology of Welding and Joining, JWS, Kobe, Japan　1　639-644　2001年11月

In-situ Observation of Interlayer Growth during Post-weld Heat Treatment in Friction-welded Joint of Titanium and Aluminum 査読有り

Akiyoshi Fuji, Kenji Ikeuchi, Masaaki Kimura, Yutaka S. Sato, Hiroyuki Kokawa

Proceedings of the 7th International Welding Symposium on Today and Tomorrow in Science and Technology of Welding and Joining, JWS, Kobe, Japan　1　663-668　2001年11月

Prevention of Weld Decay of Austenitic Stainless Steel by Twin-induced Grain Boundary Engineering 査読有り

Masayuki Shimada, Hiroyuki Kokawa, Zhan Jie Wang, Yutaka S. Sato

Proceedings of the 7th International Welding Symposium on Today and Tomorrow in Science and Technology of Welding and Joining, JWS, Kobe, Japan　2　681-686　2001年11月

Mechanism of Nitrogen Absorption of Steel Weld Metal During Laser Welding 査読有り

Wei Dong, Hiroyuki Kokawa, Yutaka S. Sato, Susumu Tsukamoto, Makoto Ogawa

Proceedings of the 7th International Welding Symposium on Today and Tomorrow in Science and Technology of Welding and Joining, JWS, Kobe, Japan　2　845-850　2001年11月

Evaluation of Ductile-Brittle Transition Temperature in Electron-Beam Welded Steel by Small Punch Test 査読有り

Xiaohui Gai, Yutaka S. Sato, Hiroyuki Kokawa, Kazutoshi Ichikawa

Proceedings of Asian Pacific Conference on Fracture And Strength '01 & International Conference on Advanced Technology In Experimental Mechanics '01, JSME　2　1030-1035　2001年10月

DOI： 10.1299/jsmeatemapcfs.2.01.03.0_1030 　

Arrest of Intergranular Corrosion in Austenitic Stainless Steel by Twin-Induced Grain Boundary Engineering 査読有り

Masayuki Shimada, Hiroyuki Kokawa, Zhang Jie Wang, Yutaka S. Sato

Proceedings of Asian Pacific Conference on Fracture And Strength '01 & International Conference on Advanced Technology In Experimental Mechanics '01, JSME　2　1036-1040　2001年10月

DOI： 10.1299/jsmeatemapcfs.2.01.03.0_1036 　

Distributions of hardness and microstructure in friction stir weld of Al alloy 6063 査読有り

Yutaka S. Sato, Hiroyuki Kokawa, Masatoshi Enomoto, Shigetoshi Jogan, Takenori Hashimoto

Proceedings of the 3rd International Symposium on Friction Stir Welding, Kobe, Japan　3　CDR　2001年9月

Retention of fine grained microstructure of equal channel angular pressed aluminum alloy 1050 by friction stir welding 査読有り

YS Sato, M Urata, H Kokawa, K Ikeda, M Enomoto

SCRIPTA MATERIALIA　45　(1)　109-114　2001年7月

DOI： 10.1016/S1359-6462(01)01000-4 　

ISSN：1359-6462

Microtexture in the friction-stir weld of an aluminum alloy 査読有り

YS Sato, H Kokawa, K Ikeda, M Enomoto, S Jogan, T Hashimoto

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　32　(4)　941-948　2001年4月

DOI： 10.1007/s11661-001-0351-z 　

ISSN：1073-5623

Microstructural characteristics in friction stir welded aluminum alloys

Yutaka S. Sato, Hiroyuki Kokawa

Keikinzoku Yosetsu/Journal of Light Metal Welding and Construction　39　(1)　15-21　2001年1月

ISSN：0368-5306

Properties of as welded and heat treated pure titanium-7075 Al-Zn-Mg alloy friction weld joints 査読有り

A Fuji, K Ameyama, H Kokawa, Y Satoh, TH North

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　6　(1)　23-30　2001年

DOI： 10.1179/136217101101538505 　

ISSN：1362-1718

Dependence of Carbide Precipitation on Grain Boundary Structure in Sensitized Austenitic Stainless Steel 査読有り

Hiroyuki Kokawa, Takashi Koyanagawa, Masayuki Shimada, Yutaka S. Sato, Takeshi Kuwana

Properties of Complex Inorganic Solids 2, ed. by A. Meike et al., Kluwer Academic/Plenum Publishers, New York　17-26　2000年11月

Arrest of Weld Decay of Austenitic Stainless Steel by Grain Boundary Engineering 査読有り

Hiroyuki Kokawa, Masayuki Shimada, Yutaka S. Sato

Proceedings of International Workshop on Fundamental Study and Its Application of Intelligent Nano and Mesoscopic Structured Materials by Field Control, ISRE 2000　91-105　2000年8月

Effect of Grain Boundary Structure on Weld Decay of 304 Austenitic Stainless Steel 査読有り

Hiroyuki Kokawa, Masayuki Shimada, Yutaka S. Sato

Proceedings of J. J. Jonas Symposium on Thermomechanical Processing of Steel, edited by S. Yue and E. Essadiqi, COM 2000, CIM　581-593　2000年8月

Grain-boundary structure and precipitation in sensitized austenitic stainless steel 査読有り

H Kokawa, M Shimada, YS Sato

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY　52　(7)　34-37　2000年7月

DOI： 10.1007/s11837-000-0159-0 　

ISSN：1047-4838

Dependence of Carbide Precipitation on Grain Boundary Structure in Sensitized Austenitic Stainless Steel 査読有り

Hiroyuki Kokawa, Takashi Koyanagawa, Masayuki Shimada, Yutaka S. Sato, Takeshi Kuwana

Properties of Complex Inorganic Solids 2　17-26　2000年

Ti-Ni形状記憶合金溶接部の形状回復及び引張特性に及ぼす窒素の影響 - Ti-Ni形状記憶合金のGTA溶接に関する研究(第2報) 査読有り

佐藤嘉洋, 粉川博之, 桑名武, 佐藤正一, 佐藤裕

溶接学会論文集　18　(2)　318-323　2000年

DOI： 10.2207/qjjws.18.318 　

ISSN：0288-4771

Precipitation sequence in friction stir weld of 6063 aluminum during aging 査読有り

YS Sato, H Kokawa, M Enomoto, S Jogan, T Hashimoto

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　30　(12)　3125-3130　1999年12月

DOI： 10.1007/s11661-999-0223-5 　

ISSN：1073-5623

Effects of Magnetic Stirring and Grain Structure on Ultrasonic Characteristics in Inconel Overlay-Welds 査読有り

H. Kokawa, Y. S. Sato, A. Ishida, T. Arakawa, K. Hirano

Proceedings of 5th International Conference on Trands in Welding Research, Georgia, USA, Edited by J.M. Vitek, S.A. David, J.A. Johnson, H.B. Smartt, T. DebRoy, ASM International　5　67-71　1999年6月

Effect of Nitrogen on Sigma Transformation in Duplex Stainless Steel Weld Metal at High Temperatures 査読有り

Yutaka S. Sato, Hiroyuki Kokawa, Takeshi Kuwana

Proceedings of 5th International Conference on Trands in Welding Research, Georgia, USA, Edited by J.M. Vitek, S.A. David, J.A. Johnson, H.B. Smartt, T. DebRoy, ASM International　5　131-136　1999年6月

Preferential precipitation site of sigma phase in duplex stainless steel weld metal 査読有り

Yutaka S. Sato, Hiroyuki Kokawa

Scripta Materialia　40　(6)　659-663　1999年2月19日

DOI： 10.1016/S1359-6462(98)00483-7 　

ISSN：1359-6462

Superplastic deformation mechanisms of monolithic intermetallics 査読有り

WY Kim, Y Sato, S Semboshi, S Hanada, H Kokawa

TOWARDS INNOVATION IN SUPERPLASTICITY II　304-3　147-154　1999年

ISSN：0255-5476

Effect of Nitrogen on σ Transformation in Duplex Stainless Steel Weld Metal 査読有り

Y. S. Sato, H. Kokawa, T. Kuwana

Science and Technology of Welding and Joining　4　(1)　41-49　1999年

DOI： 10.1179/stw.1999.4.1.41 　

ISSN：1362-1718

Behaviour of Nitrogen in High Strength Stainless Steel JJ1 Weld Metal 査読有り

H. Kokawa, Y. S. Sato, T. Kuwana, Y. Shindo

IIW Document IX-1908-98　51　1-10　1998年9月

Effect of nitrogen on corrosion of duplex stainless steel weld metal 査読有り

H Matsunaga, YS Sato, H Kokawa, T Kuwana

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING　3　(5)　225-232　1998年

DOI： 10.1179/stw.1998.3.5.225 　

ISSN：1362-1718