Microstructure evolution of γ-Al2O3/FeAl tritium permeation barrier coatings under 6.4 MeV Fe3+ ion irradiation

Fengcheng Liu, Hucheng Yu, Xiaoou Yi, Shunjie Deng, Shulei Li, Kiyohiro Yabuuchi, Somei Ohnuki

Nuclear Materials and Energy　38　101627-101627　2024/03

DOI： 10.1016/j.nme.2024.101627 　

ISSN： 2352-1791

eISSN： 2352-1791

Thermal annealing effect on D retention for damaged W-10%Re alloy

Yasuhisa Oya, Nao Inozume, Yuzuka Hoshino, Naoaki Yoshida, Tatsuya Hinoki, Kiyohiro Yabuuchi, Yuji Hatano, Qilai Zhou, Fei Sun, Robert Kolasinski, Chase N. Taylor, Masashi Shimada

Fusion Engineering and Design　196　113981-113981　2023/11

DOI： 10.1016/j.fusengdes.2023.113981 　

ISSN： 0920-3796

Ultrahigh-Flux Concerting Materials

Takuya NAGASAKA, Makoto I. KOBAYASHI, Teruya TANAKA, Sadatsugu TAKAYAMA, Hiroyuki NOTO, Jingjie SHEN, Tatsuya HINOKI, Kiyohiro YABUUCHI, Katsuaki TANABE, Ryuta KASADA, Sosuke KONDO, Shuhei NOGAMI, Hiroki KURITA, Naoyuki HASHIMOTO, Yuji YAMAUCHI, Yasuhisa OYA, Takumi CHIKADA, Yuji HATANO, Kazunari KATAYAMA, Makoto OYA, Naoko OONO, Yoshitaka MORI

Plasma and Fusion Research　18　2505085-2505085　2023/10/23

DOI： 10.1585/pfr.18.2505085 　

eISSN： 1880-6821

Irradiation effects on binary tungsten alloys at elevated temperatures: Vacancy cluster formation, precipitation of alloying elements and irradiation hardening

Jing Wang, Yuji Hatano, Takeshi Toyama, Tatsuya Hinoki, Kiyohiro Yabuuchi, Yi-fan Zhang, Bing Ma, Alexander V. Spitsyn, Nikolay P. Bobyr, Koji Inoue, Yasuyoshi Nagai

Materials & Design　229　111899-111899　2023/05

DOI： 10.1016/j.matdes.2023.111899 　

ISSN： 0264-1275

Effects of grain boundary volume fraction on the threshold dose of irradiation-induced SiC amorphization at 30 °C Peer-reviewed

Xinwei Yuan, Sosuke Kondo, Kiyohiro Yabuuchi, Hao Yu, Yasuyuki Ogino, Ryuta Kasada

Journal of the European Ceramic Society　43　(12)　5125-5135　2023/04

DOI： 10.1016/j.jeurceramsoc.2023.04.042 　

ISSN： 0955-2219

eISSN： 1873-619X

Cavity evolution and void swelling in dual ion irradiated tempered martensitic steels

Takuya Yamamoto, Yuan Wu, Kiyohiro Yabuuchi, Jack Haley, Kenta Yoshida, Akihiko Kimura, G. Robert Odette

Journal of Nuclear Materials　576　154201-154201　2023/04

DOI： 10.1016/j.jnucmat.2022.154201 　

ISSN： 0022-3115

Twofold age-hardening mechanism of Al-added high-Cr ODS ferritic steels

Akihiko Kimura, Wei Sang, Wentuo Han, Kiyohiro Yabuuchi, Zongxi Xin, Junhua Luan, Peng Dou

Journal of Nuclear Materials　575　154223-154223　2023/03

DOI： 10.1016/j.jnucmat.2022.154223 　

ISSN： 0022-3115

Microstructural evolution in tungsten binary alloys under proton and self-ion irradiations at 800 °C

Takeshi Miyazawa, Yuta Kikuchi, Masami Ando, Ju-Hyeon Yu, Kiyohiro Yabuuchi, Takashi Nozawa, Hiroyasu Tanigawa, Shuhei Nogami, Akira Hasegawa

Journal of Nuclear Materials　575　154239-154239　2023/03

DOI： 10.1016/j.jnucmat.2023.154239 　

ISSN： 0022-3115

Interaction between an edge dislocation and faceted voids in body-centered cubic Fe Peer-reviewed

Kiyohiro Yabuuchi, Tomoaki Suzudo

Journal of Nuclear Materials　574　154161-154161　2023/02

DOI： 10.1016/j.jnucmat.2022.154161 　

ISSN： 0022-3115

Insights into hardening, plastically deformed zone and geometrically necessary dislocations of two ion-irradiated FeCrAl(Zr)-ODS ferritic steels: A combined experimental and simulation study

Peng Song, Kiyohiro Yabuuchi, Philippe Spätig

Acta Materialia　234　117991-117991　2022/08

DOI： 10.1016/j.actamat.2022.117991 　

ISSN： 1359-6454

Tungsten–tantalum alloys for fusion reactor applications

Shuhei Nogami, Itsuki Ozawa, Daisuke Asami, Naoya Matsuta, Seiji Nakabayashi, Siegfried Baumgärtner, Philipp Lied, Kiyohiro Yabuuchi, Takeshi Miyazawa, Yuta Kikuchi, Marius Wirtz, Michael Rieth, Akira Hasegawa

Journal of Nuclear Materials　566　153740-153740　2022/08

DOI： 10.1016/j.jnucmat.2022.153740 　

ISSN： 0022-3115

Change in nanoindentation hardness of polycrystalline tungsten irradiated with Fe ions or electrons by hydrogen gas charging

Koichi Sato, Ryuta Kasada, Atsushi Kiyohara, Masashi Hirabaru, Kenichi Nakano, Kiyohiro Yabuuchi, Masahiko Hatakeyama, Qiu Xu

Journal of Nuclear Materials　560　153483-153483　2022/03

DOI： 10.1016/j.jnucmat.2021.153483 　

ISSN： 0022-3115

Dynamic Interaction between Dislocation and Irradiation-Induced Defects in Stainless Steels during Tensile Deformation

Kiyohiro Yabuuchi

Metals　2022

DOI： 10.3390/MET12050762 　

Dynamic interaction between the dislocations and cavities in tungsten during tensile test

Kiyohiro Yabuuchi

Nuclear Materials and Energy　2022

DOI： 10.1016/J.NME.2022.101130 　

Radiation embrittlement of clad-HAZ of RPV of a decommissioned BWR plant

Hideki Yuya, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　557　153300-153300　2021/12

DOI： 10.1016/j.jnucmat.2021.153300 　

ISSN： 0022-3115

An approximate in-situ method for investigating irradiation damage of grain boundary

Lei Zhang, Yufeng Du, Wentuo Han, Pingping Liu, Xiaoou Yi, Kiyohiro Yabuuchi, Somei Ohnuki, Farong Wan

Nuclear Materials and Energy　29　101056-101056　2021/12

DOI： 10.1016/j.nme.2021.101056 　

ISSN： 2352-1791

eISSN： 2352-1791

Heavy-ion irradiation and post-irradiation annealing effects in explosion-welded CuCrZr/316LN joints for ITER application

Xiaoou Yi, Yufeng Du, Diancheng Geng, Zihao Li, Wentuo Han, Pingping Liu, Jiming Chen, Kiyohiro Yabuuchi, Kenta Yoshida, Somei Ohnuki, Qian Zhan, Farong Wan, Yasuyoshi Nagai

Materials Characterization　178　111252-111252　2021/08

DOI： 10.1016/j.matchar.2021.111252 　

ISSN： 1044-5803

Microstructure and mechanical properties of HAZ of RPVS clad with duplex stainless steel

Hideki Yuya, Ryoya Kobayashi, Kohei Otomo, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　545　152756-152756　2021/03

DOI： 10.1016/j.jnucmat.2020.152756 　

ISSN： 0022-3115

Evaluation of irradiation hardening in ODS-Cu and non ODS-Cu by nanoindentation hardness test and micro-pillar compression test after self-ion irradiation

Yuchen Liu, Sosuke Kondo, Hao Yu, Kiyohiro Yabuuchi, Ryuta Kasada

Nuclear Materials and Energy　26　100903-100903　2021/03

DOI： 10.1016/j.nme.2021.100903 　

ISSN： 2352-1791

eISSN： 2352-1791

Irradiation hardening of stainless steel model alloy after Fe-ion irradiation and post-irradiation annealing treatment

Kiyohiro Yabuuchi

Journal of Nuclear Materials　2021

DOI： 10.1016/J.JNUCMAT.2021.153296 　

On the use of charged particles to characterize precipitation in irradiated reactor pressure vessel steels with a wide range of compositions

N. Almirall, P.B. Wells, T. Yamamoto, K. Yabuuchi, A. Kimura, G.R. Odette

Journal of Nuclear Materials　536　152173-152173　2020/08

DOI： 10.1016/j.jnucmat.2020.152173 　

ISSN： 0022-3115

Effects of helium implantation with heavy ion irradiation on deuterium permeation in yttrium oxide coating

Kazuki Nakamura, Hikari Fujita, Jan Engels, Masayuki Tokitani, Yoshimitsu Hishinuma, Kiyohiro Yabuuchi, Sho Kano, Takayuki Terai, Wataru Inami, Yoshimasa Kawata, Takumi Chikada

Journal of Nuclear Materials　537　152244-152244　2020/08

DOI： 10.1016/j.jnucmat.2020.152244 　

ISSN： 0022-3115

eISSN： 1873-4820

Statistical Approach for Understanding the Effect of Specimen Size on the Yield Stress and Its Scattering in Mechanically-Alloyed Cu and ODS-Cu Obtained by Micro-Pillar Compression Test

Yuchen Liu, Sosuke Kondo, Hao Yu, Kiyohiro Yabuuchi, Ryuta Kasada

MATERIALS TRANSACTIONS　61　(5)　955-962　2020/05/01

DOI： 10.2320/matertrans.mt-mbw2019005 　

ISSN： 1345-9678

eISSN： 1347-5320

Assessment of phase stability of oxide particles in different types of 15Cr-ODS ferritic steels under 6.4 MeV Fe ion irradiation at 200 °C

Peng Song, Akihiko Kimura, Kiyohiro Yabuuchi, Peng Dou, Hideo Watanabe, Jin Gao, Yen-Jui Huang

Journal of Nuclear Materials　529　151953-151953　2020/02

DOI： 10.1016/j.jnucmat.2019.151953 　

ISSN： 0022-3115

The stability of γ′ precipitates in a multi-component FeCoNiCrTi_0.2 alloy under elevated-temperature irradiation

Kiyohiro Yabuuchi

Journal of Nuclear Materials　2020

DOI： 10.1016/J.JNUCMAT.2020.152364 　

Dose dependence of ion irradiation effects on 12Cr–6Al-ODS steel with electron-beam weld line

Jin Gao, Yuuki Yamasaki, Peng Song, Yen-Jui Huang, Kiyohiro Yabuuchi, Akihiko Kimura, Kan Sakamoto, Shinichiro Yamashita

Journal of Nuclear Materials　528　151858-151858　2020/01

DOI： 10.1016/j.jnucmat.2019.151858 　

ISSN： 0022-3115

eISSN： 1873-4820

Effects of neutron irradiation on 12Cr–6Al-ODS steel with electron-beam weld line

Jin Gao, Peng Song, Yen-Jui Huang, Kiyohiro Yabuuchi, Akihiko Kimura, Kan Sakamoto, Shinichiro Yamashita

Journal of Nuclear Materials　524　1-8　2019/10

DOI： 10.1016/j.jnucmat.2019.06.028 　

ISSN： 0022-3115

eISSN： 1873-4820

Valence Electron and Chemical State Analysis of Be₁₂M (M = Ti, V) Beryllides by Soft X-ray Emission Spectroscopy

Keisuke Mukai, Ryuta Kasada, Kiyohiro Yabuuchi, Satoshi Konishi, Jae-Hwan Kim, Masaru. Nakamichi

ACS Applied Energy Materials　2　(4)　2889-2895　2019/03/07

DOI： 10.1021/acsaem.9b00223 　

ISSN： 2574-0962

eISSN： 2574-0962

Ion-irradiation hardening and microstructural evolution in F82H and ferritic alloys

Jin Gao, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　515　294-302　2019/03/01

DOI： 10.1016/j.jnucmat.2018.12.047 　

ISSN： 0022-3115

Characterization of ordered dislocation loop raft in Fe3+ irradiated pure iron at 300 °C

Jin Gao, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　511　304-311　2018/12/01

DOI： 10.1016/j.jnucmat.2018.09.020 　

ISSN： 0022-3115

Investigation of mechanical properties of stress-relieved and electron-irradiated tungsten after hydrogen charging

K. Sato, H. Yamashita, A. Hirosako, S. Komazaki, Q. Xu, M. Onoue, R. Kasada, K. Yabuuchi, A. Kimura

Nuclear Materials and Energy　17　29-33　2018/12

DOI： 10.1016/j.nme.2018.08.003 　

eISSN： 2352-1791

Ion-irradiation hardening accompanied by irradiation-induced dissolution of oxides in FeCr(Y, Ti)-ODS ferritic steel

Peng Song, Jin Gao, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　511　200-211　2018/12/01

DOI： 10.1016/j.jnucmat.2018.09.007 　

ISSN： 0022-3115

Joint inhomogeneity in dissimilar friction stir welded martensitic and nanostructured ferritic steels

Wentuo Han, Farong Wan, Kiyohiro Yabuuchi, Hisashi Serizawa, Akihiko Kimura

Science and Technology of Welding and Joining　23　(8)　659-665　2018/11/01

DOI： 10.1080/13621718.2018.1456797 　

ISSN： 1362-1718

eISSN： 1743-2936

Tensile properties of mechanically alloyed Zr added austenitic stainless steel

Daniel Morrall, Jin Gao, Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura, Takahiro Ishizaki, Yusaku Maruno

Nuclear Materials and Energy　15　92-96　2018/05/01

DOI： 10.1016/j.nme.2018.03.002 　

ISSN： 2352-1791

Cavity evolution and hardness changes in a 15Cr-ODS ferritic steel by post He-implantation annealing

Peng Song, Kiyohiro Yabuuchi, Akihiko Kimura

Nuclear Materials and Energy　15　115-121　2018/05/01

DOI： 10.1016/j.nme.2018.03.006 　

ISSN： 2352-1791

Radiation response of ODS ferritic steels with different oxide particles under ion-irradiation at 550 °C

Peng Song, Daniel Morrall, Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　502　76-85　2018/04/15

DOI： 10.1016/j.jnucmat.2018.02.007 　

ISSN： 0022-3115

Impact of friction stir welding on recrystallization of oxide dispersion strengthened ferritic steel

Wentuo Han, Pingping Liu, Xiaoou Yi, Qian Zhan, Farong Wan, Kiyohiro Yabuuchi, Hisashi Serizawa, Akihiko Kimura

Journal of Materials Science & Technology　34　(1)　209-213　2018/01

DOI： 10.1016/j.jmst.2017.11.032 　

ISSN： 1005-0302

Development of high irradiation resistant and corrosion resistant oxide dispersion strengthened austenitic stainless steels

Takahiro Ishizaki, Yusaku Maruno, Kiyohiro Yabuuchi, Sosuke Kondo, Akihiko Kimura

Minerals, Metals and Materials Series　9　605-615　2018

DOI： 10.1007/978-3-319-67244-1_39 　

ISSN： 2367-1696 2367-1181

eISSN： 2367-1696

Deuterium permeation behavior and its iron-ion irradiation effect in yttrium oxide coating deposited by magnetron sputtering

Takumi Chikada, Hikari Fujita, Jan Engels, Anne Houben, Jumpei Mochizuki, Seira Horikoshi, Moeki Matsunaga, Masayuki Tokitani, Yoshimitsu Hishinuma, Sosuke Kondo, Kiyohiro Yabuuchi, Thomas Schwarz-Selinger, Takayuki Terai, Yasuhisa Oya

Journal of Nuclear Materials　511　560-566　2018

DOI： 10.1016/j.jnucmat.2018.06.008 　

ISSN： 0022-3115

Application of small specimen test technique to evaluate fracture toughness of reduced activation ferritic/martensitic steel

Wentuo Han, Kiyohiro Yabuuchi, Ryuta Kasada, Akihiko Kimura, Eiichi Wakai, Hiroyasu Tanigawa, Pingping Liu, Xiaoou Yi, Farong Wan

Fusion Engineering and Design　125　326-329　2017/12

DOI： 10.1016/j.fusengdes.2017.01.040 　

ISSN： 0920-3796

Helium bubble formation behavior in ODS ferritic steels with and without simultaneous addition of Al and Zr

Peng Song, Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura

Fusion Engineering and Design　125　396-401　2017/12/01

DOI： 10.1016/j.fusengdes.2017.03.139 　

ISSN： 0920-3796

Deuterium permeation behavior in iron-irradiated erbium oxide coating

Takumi Chikada, Hikari Fujita, Moeki Matsunaga, Seira Horikoshi, Jumpei Mochizuki, Cui Hu, Freimut Koch, Masayuki Tokitani, Yoshimitsu Hishinuma, Kiyohiro Yabuuchi, Yasuhisa Oya

Fusion Engineering and Design　124　915-918　2017/11/01

DOI： 10.1016/j.fusengdes.2017.01.016 　

ISSN： 0920-3796

Effect of displacement damage level on the ion-irradiation affected zone evolution in W single crystals

Eva Hasenhuetl, Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　495　314-321　2017/11

DOI： 10.1016/j.jnucmat.2017.08.030 　

ISSN： 0022-3115

eISSN： 1873-4820

Crystal orientation dependence of ion-irradiation hardening in pure tungsten

Eva Hasenhuetl, Zhexian Zhang, Kiyohiro Yabuuchi, Peng Song, Akihiko Kimura

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms　397　11-14　2017/04

DOI： 10.1016/j.nimb.2017.02.030 　

ISSN： 0168-583X

eISSN： 1872-9584

Evaluation of Ion-Irradiation Hardening of Tungsten Single Crystals by Nanoindentation Technique Considering Material Pile-Up Effect

Eva Hasenhuetl, Ryuta Kasada, Zhexian Zhang, Kiyohiro Yabuuchi, Yen-Jui Huang, Akihiko Kimura

MATERIALS TRANSACTIONS　58　(5)　749-756　2017

DOI： 10.2320/matertrans.m2016437 　

ISSN： 1345-9678

eISSN： 1347-5320

Ion-Irradiation Effect on Strain Rate Sensitivity of Nanoindentation Hardness of W Single Crystal

Eva Hasenhuetil, Ryuta Kasada, Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura

MATERIALS TRANSACTIONS　58　(4)　580-586　2017

DOI： 10.2320/matertrans.ML201603 　

ISSN： 1345-9678

eISSN： 1347-5320

Effect of self-ion irradiation on hardening and microstructure of tungsten

T. Hwang, M. Fukuda, S. Nogami, A. Hasegawa, H. Usami, K. Yabuuchi, K. Ozawa, H. Tanigawa

Nuclear Materials and Energy　9　430-435　2016/12/01

DOI： 10.1016/j.nme.2016.06.005 　

ISSN： 2352-1791

eISSN： 2352-1791

Effect of Cr/Al contents on the 475^ºC age-hardening in oxide dispersion strengthened ferritic steels

Wentuo Han, Kiyohiro Yabuuchi, Akihiko Kimura, Shigeharu Ukai, Naoko Oono, Takeji Kaito, Tadahiko Torimaru, Shigenari Hayashi

Nuclear Materials and Energy　9　610-615　2016/12/01

DOI： 10.1016/j.nme.2016.05.015 　

eISSN： 2352-1791

Evaluation of helium effect on ion-irradiation hardening in pure tungsten by nano-indentation method

Zhexian Zhang, Eva Hasenhuetl, Kiyohiro Yabuuchi, Akihiko Kimura

Nuclear Materials and Energy　9　539-546　2016/12/01

DOI： 10.1016/j.nme.2016.06.010 　

ISSN： 2352-1791

Defect distribution in ion-irradiated pure tungsten at different temperatures

Zhexian Zhang, Kiyohiro Yabuuchi, Akihiko Kimura

Journal of Nuclear Materials　480　207-215　2016/11

DOI： 10.1016/j.jnucmat.2016.08.029 　

ISSN： 0022-3115

eISSN： 1873-4820

Neutron irradiation effects on the microstructural development of tungsten and tungsten alloys

Akira Hasegawa, Makoto Fukuda, Kiyohiro Yabuuchi, Shuhei Nogami

Journal of Nuclear Materials　471　175-183　2016/04

DOI： 10.1016/j.jnucmat.2015.10.047 　

ISSN： 0022-3115

eISSN： 1873-4820

The effect of voids on the hardening of body-centered cubic Fe

Ryosuke Nakai, Kiyohiro Yabuuchi, Shuhei Nogami, Akira Hasegawa

Journal of Nuclear Materials　471　233-238　2016/04

DOI： 10.1016/j.jnucmat.2015.09.048 　

ISSN： 0022-3115

eISSN： 1873-4820

Plastic deformation behavior and bonding strength of an EBW joint between 9Cr-ODS and JLF-1 estimated by symmetric four-point bend tests combined with FEM analysis

Haiying Fu, Takuya Nagasaka, Takeo Muroga, Wenhai Guan, Shuhei Nogami, Hisashi Serizawa, Shaofei Geng, Kiyohiro Yabuuchi, Akihiko Kimura

Fusion Engineering and Design　102　88-93　2016/01

DOI： 10.1016/j.fusengdes.2015.11.037 　

ISSN： 0920-3796

eISSN： 1873-7196

Oxide Dispersion Strengthened Steels for Advanced Blanket Systems

Akihiko KIMURA, Wentuo HAN, Hwanil JE, Kiyohiro YABUUCHI, Ryuta KASADA

Plasma and Fusion Research　11　2505090-2505090　2016

DOI： 10.1585/pfr.11.2505090 　

eISSN： 1880-6821

Anisotropy in the mechanical properties of potassium and rhenium doped tungsten alloy plates for fusion reactor application

Makoto Fukuda, Shuhei Nogami, Kiyohiro Yabuuchi, Akira Hasegawa, Takeo Muroga

Fusion Science and Technology　68　(3)　690-693　2015/10/01

DOI： 10.13182/FST14-998 　

ISSN： 1536-1055

eISSN： 1943-7641

Effect of post-weld heat treatment and neutron irradiation on a dissimilar-metal joint between F82H steel and 316L stainless steel

Haiying Fu, Takuya Nagasaka, Nobuyuki Kometani, Takeo Muroga, Wenhai Guan, Shuhei Nogami, Kiyohiro Yabuuchi, Takuya Iwata, Akira Hasegawa, Masanori Yamazaki, Sho Kano, Yuhki Satoh, Hiroaki Abe, Hiroyasu Tanigawa

Fusion Engineering and Design　98-99　1968-1972　2015/10

DOI： 10.1016/j.fusengdes.2015.06.079 　

ISSN： 0920-3796

eISSN： 1873-7196

Effects of temperature and strain rate on the tensile properties of potassium-doped tungsten

Kenta Sasaki, Kiyohiro Yabuuchi, Shuhei Nogami, Akira Hasegawa

Journal of Nuclear Materials　461　357-364　2015/06

DOI： 10.1016/j.jnucmat.2015.03.015 　

ISSN： 0022-3115

eISSN： 1873-4820

Effects of Ta and C on irradiation hardening of austenitic stainless Peer-reviewed

Yasuyuki SAKAI, Yutaka KURIBAYASHI, Kiyohiro YABUUCHI, Akira HASEGAWA, Shuhei NOGAMI, Junya KANEDA, Naoto SHIGENAKA

Journal of Plasma and Fusion Research SERIES　11　83-88　2015/03/30

Thermo-mechanical analysis of tungsten and its alloys monoblock divertor under heat load conditions relevant to a fusion reactor Peer-reviewed

Makoto FUKUDA, Shuhei NOGAMI, Akira HASEGAWA, Kiyohiro YABUUCHI, Koichiro EZATO, Satoshi SUZUKI, Hitoshi TAMURA, Takeo MUROGA

Journal of Plasma and Fusion Research SERIES　11　99-103　2015/03/30

Microstructural development of tungsten and tungsten–rhenium alloys due to neutron irradiation in HFIR

Makoto Fukuda, Kiyohiro Yabuuchi, Shuhei Nogami, Akira Hasegawa, Teruya Tanaka

Journal of Nuclear Materials　455　(1-3)　460-463　2014/12

DOI： 10.1016/j.jnucmat.2014.08.002 　

ISSN： 0022-3115

eISSN： 1873-4820

Effect of He implantation on fracture behavior and microstructural evolution in F82H

Kiyohiro Yabuuchi, Kiminori Sato, Shuhei Nogami, Akira Hasegawa, Masami Ando, Hiroyasu Tanigawa

Journal of Nuclear Materials　455　(1-3)　690-694　2014/12

DOI： 10.1016/j.jnucmat.2014.09.018 　

ISSN： 0022-3115

eISSN： 1873-4820

Neutron irradiation effects on tungsten materials

Akira Hasegawa, Makoto Fukuda, Shuhei Nogami, Kiyohiro Yabuuchi

Fusion Engineering and Design　89　(7-8)　1568-1572　2014/10

DOI： 10.1016/j.fusengdes.2014.04.035 　

ISSN： 0920-3796

eISSN： 1873-7196

Depth-dependent nanoindentation hardness of reduced-activation ferritic steels after MeV Fe-ion irradiation

Ryuta Kasada, Satoshi Konishi, Kiyohiro Yabuuchi, Shuhei Nogami, Masami Ando, Dai Hamaguchi, Hiroyasu Tanigawa

Fusion Engineering and Design　89　(7-8)　1637-1641　2014/10

DOI： 10.1016/j.fusengdes.2014.03.068 　

ISSN： 0920-3796

eISSN： 1873-7196

Tensile properties of K-doped W–3%Re

Makoto Fukuda, Shuhei Nogami, Akira Hasegawa, Hiroshi Usami, Kiyohiro Yabuuchi, Takeo Muroga

Fusion Engineering and Design　89　(7-8)　1033-1036　2014/10

DOI： 10.1016/j.fusengdes.2014.02.062 　

ISSN： 0920-3796

eISSN： 1873-7196

A dual ion irradiation study of helium–dpa interactions on cavity evolution in tempered martensitic steels and nanostructured ferritic alloys

Takuya Yamamoto, Yuan Wu, G. Robert Odette, Kiyohiro Yabuuchi, Sosuke Kondo, Akihiko Kimura

Journal of Nuclear Materials　449　(1-3)　190-199　2014/06

DOI： 10.1016/j.jnucmat.2014.01.040 　

ISSN： 0022-3115

eISSN： 1873-4820

Microstructure development of dispersion-strengthened tungsten due to neutron irradiation

Makoto Fukuda, Akira Hasegawa, Shuhei Nogami, Kiyohiro Yabuuchi

Journal of Nuclear Materials　449　(1-3)　213-218　2014/06

DOI： 10.1016/j.jnucmat.2013.10.012 　

ISSN： 0022-3115

eISSN： 1873-4820

Evaluation of irradiation hardening of proton irradiated stainless steels by nanoindentation

Kiyohiro Yabuuchi, Yutaka Kuribayashi, Shuhei Nogami, Ryuta Kasada, Akira Hasegawa

Journal of Nuclear Materials　446　(1-3)　142-147　2014/03

DOI： 10.1016/j.jnucmat.2013.12.009 　

ISSN： 0022-3115

eISSN： 1873-4820

Effects of tool rotation speed on the mechanical properties and microstructure of friction stir welded ODS steel

Kiyohiro Yabuuchi, Naoto Tsuda, Akihiko Kimura, Yoshiaki Morisada, Hidetoshi Fujii, Hisashi Serizawa, Shuhei Nogami, Akira Hasegawa, Takuya Nagasaka

Materials Science and Engineering: A　595　291-296　2014/02

DOI： 10.1016/j.msea.2013.12.022 　

ISSN： 0921-5093

eISSN： 1873-4936

Neutron Irradiation Effects on Grain-refined W and W-alloys Peer-reviewed

A. Hasegawa, M. Fukuda, T. Tanno, S. Nogami, K. Yabuuchi, T.Tanaka, T.Muroga

Proceedings of 25th IAEA Fusion Energy Conference　2014

Effect of Rotation Speed on Microstructure and Hardness of Friction Stir Welded ODS Ferritic Steel

W.T. Han, N. Tsuda, D.S. Chen, Y. Ha, H. Je, H. Noto, Y. Morisada, H. Serizawa, H. Fujii, K. Yabuuchi, A. Kimura

Proceedings of the 1st International Joint Symposium on Joining and Welding (IJS-JW2013)　81-85　2013/11

Nanoindentation hardness and its extrapolation to bulk-equivalent hardness of F82H steels after single- and dual-ion beam irradiation

Y. Takayama, R. Kasada, Y. Sakamoto, K. Yabuuchi, A. Kimura, M. Ando, D. Hamaguchi, H. Tanigawa

Journal of Nuclear Materials　442　(1-3)　S23-S27　2013/11

DOI： 10.1016/j.jnucmat.2012.12.033 　

ISSN： 0022-3115

eISSN： 1873-4820

Effect of alloying elements on irradiation hardening behavior and microstructure evolution in BCC Fe

Kiyohiro Yabuuchi, Ryuta Kasada, Akihiko Kimura

Journal of Nuclear Materials　442　(1-3)　S790-S795　2013/11

DOI： 10.1016/j.jnucmat.2013.04.035 　

ISSN： 0022-3115

eISSN： 1873-4820

Effect of Mn addition on one-dimensional migration of dislocation loops in body-centered cubic Fe

Kiyohiro Yabuuchi, Ryuta Kasada, Akihiko Kimura

Acta Materialia　61　(17)　6517-6523　2013/10

DOI： 10.1016/j.actamat.2013.07.029 　

ISSN： 1359-6454

Ion-Irradiation Hardening of Brazed Joints of Tungsten and Oxide Dispersion Strengthened (ODS) Ferritic Steel

Y. Himei, K. Yabuuchi, R. Kasada, S. Noh, H. Noto, T. Nagasaka, S. Nogami, A. Kimura

MATERIALS TRANSACTIONS　54　(4)　446-450　2013

DOI： 10.2320/matertrans.mg201212 　

ISSN： 1345-9678

eISSN： 1347-5320

Bend Stress Relaxation of Pure Tungsten

Kenta SASAKI, Shuhei NOGAMI, Makoto FUKUDA, Kiyohiro YABUUCHI, Akira HASEGAWA

Plasma and Fusion Research　8　1405006-1405006　2013

DOI： 10.1585/pfr.8.1405006 　

ISSN： 1880-6821

eISSN： 1880-6821

Dose dependence of irradiation hardening of binary ferritic alloys irradiated with Fe3+ ions

Kiyohiro Yabuuchi, Hiroki Yano, Ryuta Kasada, Hirotatsu Kishimoto, Akihiko Kimura

Journal of Nuclear Materials　417　(1-3)　988-991　2011/10

DOI： 10.1016/j.jnucmat.2010.12.204 　

ISSN： 0022-3115

eISSN： 1873-4820

A new approach to evaluate irradiation hardening of ion-irradiated ferritic alloys by nano-indentation techniques

Ryuta Kasada, Yoshiyuki Takayama, Kiyohiro Yabuuchi, Akihiko Kimura

Fusion Engineering and Design　86　(9-11)　2658-2661　2011/10

DOI： 10.1016/j.fusengdes.2011.03.073 　

ISSN： 0920-3796

Neutron irradiation hardening and microstructure changes in Fe–Mn binary alloys

Kiyohiro Yabuuchi, Masashi Saito, Ryuta Kasada, Akihiko Kimura

Journal of Nuclear Materials　414　(3)　498-502　2011/07

DOI： 10.1016/j.jnucmat.2011.05.008 　

ISSN： 0022-3115

Neutron Irradiation Hardening of Fe-Based Binary Alloys Peer-reviewed

Kiyohiro Yabuuchi, Masashi Saito, Ryuta Kasada, Akihiko Kimura

PRICM 7, PTS 1-3　654-656　2911　2010

DOI： 10.4028/www.scientific.net/MSF.654-656.2911 　

ISSN： 0255-5476

Evaluation of Irradiation Hardening of Fe-Ion Irradiated F82H by Nano-Indentation Techniques

Yoshiyuki Takayama, Ryuta Kasada, Kiyohiro Yabuuchi, Akihiko Kimura, Dai Hamaguchi, Masami Ando, Hiroyasu Tanigawa

PRICM 7, PTS 1-3　654-656　2915　2010

DOI： 10.4028/www.scientific.net/MSF.654-656.2915 　

ISSN： 0255-5476

Relation between martensite morphology and volume change accompanying fcc to bcc martensitic transformation in Fe–Ni–Co alloys

A. Shibata, H. Yonezawa, K. Yabuuchi, S. Morito, T. Furuhara, T. Maki

Materials Science and Engineering: A　438-440　241-245　2006/11

DOI： 10.1016/j.msea.2005.12.044 　

ISSN： 0921-5093