Details of the Researcher

PHOTO

Xu Sheng
Section
Frontier Research Institute for Interdisciplinary Sciences
Job title
Assistant Professor
Degree

  • Ph.D. (Tohoku University)

e-Rad No.
10907033

Research History 6

  • 2024/04 - Present
    Tohoku University　Frontier Research Institute for Interdisciplinary Sciences　Assistant Professor

  • 2024/04 - 2026/03
    Tohoku University　Graduate School of Engineering

  • 2021/03 - 2024/03
    Tohoku University　Graduate School of Engineering

  • 2020/04 - 2021/02
    Tohoku University　Graduate School of Engineering

  • 2018/04 - 2020/03
    日本学術振興会　特別研究員（DC2）

  • 2015/04 - 2016/03
    Tohoku University　Graduate School of Engineering

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Education 3

  • Tohoku University

    2017/04 - 2020/03

  • 北京科技大学

    2014/09 - 2017/01

  • 北京科技大学

    2010/09 - 2014/06

Professional Memberships 6

  • 日本中性子科学会

  • Materials Research Society (MRS)

  • 形状記憶合金協会

  • 日本鉄鋼学会

  • The Minerals, Metals& Materials Society (TMS)

  • 日本金属学会

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Research Areas 3

  • Nanotechnology/Materials / Material fabrication and microstructure control /

  • Nanotechnology/Materials / Structural and functional materials /

  • Nanotechnology/Materials / Metallic materials /

Awards 10

  1. Innovators Under 35 Japan 2025

    2025/12　MITテクノロジーレビュー

  2. 第31回青葉工学研究奨励賞

    2025/12　一般財団法人青葉工学振興会

  3. 第23回日本中性子科学会奨励賞

    2025/11　日本中性子科学会

  4. 第65回原田研究奨励賞

    2025/07　公益財団法人本多記念会

  5. 第24回インテリジェント・コスモス奨励賞

    2025/05　公益財団法人インテリジェント・コスモス学術振興財団

  6. Prominent Research Fellow of Tohoku University

    2024/07　Tohoku University

  7. Best Poster Award

    2023/09　The Japan Institute of Metals and Materials

  8. Winner of "Most Viewed Presentations"

    2022/04　ICOMAT 2022

  9. Acta Student Awards

    2020/06　Acta Journals

  10. 藤野先生記念奨励賞

    2019/09　東北大学

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Papers 21

  1. Enhanced elastocaloric cooling beyond Clausius–Clapeyron limits Peer-reviewed

    Yuxin Song, Sheng Xu, Toshihiro Omori, Takuro Kawasaki, Yoshihisa Ishikawa, Ryoji Kiyanagi, Ryosuke Kainuma

    Nature Communications　17　(1)　3747　2026/04/27

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-026-72172-7 　

    eISSN： 2041-1723

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    Abstract The elastocaloric effect, driven by stress-induced martensitic transformations, offers a promising route toward efficient and environmentally friendly solid-state cooling. However, its practical implementation has been hindered by an inherent trade-off: materials exhibiting large isothermal entropy changes typically operate over narrow temperature windows, thereby limiting their overall cooling performance. Here, we demonstrate an elastocaloric response in a Ti–Al–Cr superelastic alloy that overcomes this limitation. Direct measurements reveal a pronounced elastocaloric cooling effect over an ultra-wide temperature range of 305 K, from 97 K to 402 K. This temperature span exceeds that predicted by the Clausius–Clapeyron relationship (235 K), indicating a significant deviation from conventional thermodynamic expectations. At room temperature, a large adiabatic temperature change of ~10 K is directly measured, corresponding to a cooling output of 5.76 J·g⁻ 1 and a material coefficient of performance of 4.6, demonstrating competitive cooling performance at practical operating conditions. In addition, the elastocaloric response is maintained over the entire temperature range despite the expected decrease in entropy change at lower temperatures, indicating that the conventional trade-off between temperature span and cooling strength is effectively mitigated. This exceptional behavior originates from a combination of anomalous temperature dependence of the critical stress for martensitic transformation and high mechanical strength, which together enable fully reversible stress-induced transformations across a broad thermal domain. Our findings reveal a new regime of elastocaloric behavior and establish a guiding principle for overcoming the apparent limitations imposed by Clausius–Clapeyron-based descriptions in caloric materials.

  2. Overview of orientation dependence of mechanical properties in single-crystal superelastic Cu-Al-Mn shape memory alloys Peer-reviewed

    Keisuke Asano, Sumio Kise, Sheng Xu, Toshihiro Omori, Yoshikazu Araki

    Materials Transactions　67　(4)　563-567　2026/04/01

    Publisher: Japan Institute of Metals

    DOI： 10.2320/matertrans.mt-d2025007 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  3. Experimental determination of the α/β phase equilibria in the Pd–Cu system using a composition-gradient method Peer-reviewed

    Kakeru Kobayashi, Sheng Xu, Kimika Edagawa, Daisuke Imatomi, Yuxin Song, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    Journal of Alloys and Compounds　1058　187071　2026/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.jallcom.2026.187071 　

    ISSN： 0925-8388

  4. Superelasticity in Micro-Sized Fe–Ni–Co–Al–Ti–B Shape Memory Alloys

    Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    Shape Memory and Superelasticity　12　(1)　223-228　2026/02/10

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s40830-026-00600-0 　

    ISSN： 2199-384X

    eISSN： 2199-3858

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    Abstract We report direct evidence of tensile superelasticity in micron-sized specimens of a Fe–Ni–Co–Al–Ti–B shape memory alloy. Dog-bone-shaped micro-tensile specimens were fabricated by focused ion beam milling and tested in situ under a scanning electron microscope. The corrected stress–strain curves exhibit clear hysteresis loops and superelastic strains up to ~ 4.5%, demonstrating stable transformation-mediated superelasticity at the micron scale. Both the critical transformation stress (~ 1.2 GPa) and the stress hysteresis (~ 1 GPa) are greatly enhanced compared with the bulk, reflecting pronounced size effects. These findings extend size-dependent transformation studies to precipitation-strengthened Fe-based shape memory alloys and highlight their potential for microactuators and other small-scale functional applications.

  5. 単結晶Cu–Al–Mn超弾性合金における機械的性質の結晶方位依存性の全体像 Peer-reviewed

    淺野 圭佑, 喜瀬 純男, 許 勝, 大森 俊洋, 荒木 慶一

    銅と銅合金　64　(1)　164-168　2025/11

    DOI： 10.34562/jic.64.1_164 　

  6. Texture evolution in polycrystalline FeMnAlNi shape-memory alloy sheets Peer-reviewed

    Kerui Song, Sheng Xu, Ryosuke Kainuma, Toshihiro Omori

    Acta Materialia　301　121554　2025/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.actamat.2025.121554 　

    ISSN： 1359-6454

  7. Shape memory alloys for cryogenic actuators Peer-reviewed

    Shunsuke Sato, Hirobumi Tobe, Kenichiro Sawada, Chihiro Tokoku, Takao Nakagawa, Eiichi Sato, Yoshikazu Araki, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    Communications Engineering　4　(1)　124　2025/07/16

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s44172-025-00464-9 　

    eISSN： 2731-3395

  8. High critical stress for martensitic transformation in <110> oriented single crystal Cu-Al-Mn superelastic alloys with high Mn content Peer-reviewed

    Yuka Tanikawa, Sheng Xu, Ryosuke Kainuma, Toshihiro Omori

    Materials Transactions　66　(5)　654-657　2025/05/01

    Publisher: Japan Institute of Metals

    DOI： 10.2320/matertrans.mt-m2025005 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  9. Successive stress-induced phase transformations with large stress-strain hysteresis in single crystal Cu-Al-Mn shape memory alloys Peer-reviewed

    Hiroshi Akamine, Ryo Takamatsu, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma, Sumio Kise, Kakeru Ninomiya, Maiko Nishibori, Minoru Nishida

    Acta Materialia　121054-121054　2025/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.actamat.2025.121054 　

    ISSN： 1359-6454

  10. A lightweight shape-memory alloy with superior temperature-fluctuation resistance Peer-reviewed

    Yuxin Song, Sheng Xu, Shunsuke Sato, Inho Lee, Xiao Xu, Toshihiro Omori, Makoto Nagasako, Takuro Kawasaki, Ryoji Kiyanagi, Stefanus Harjo, Wu Gong, Tomáš Grabec, Pavla Stoklasová, Ryosuke Kainuma

    Nature　638　(8052)　965-971　2025/02/26

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41586-024-08583-7 　

    ISSN： 0028-0836

    eISSN： 1476-4687

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    Abstract In advanced applications such as aerospace and space exploration, materials must balance lightness, functionality and extreme thermal fluctuation resistance1,2. Shape-memory alloys show promise with strength, toughness and substantial strain recovery due to superelasticity, but maintaining low mass and effective operation at cryogenic temperatures is challenging3–6. We hereby introduce a new shape-memory alloy that adheres to these stringent criteria. Predominantly composed of Ti and Al with a chemical composition of Ti75.25Al20Cr4.75, this alloy is characterized by a low density (4.36 × 103 kg m− 3) and a high specific strength (185 × 103 Pa m3 per kg) at room temperature, while showing excellent superelasticity. The superelasticity, owing to a reversible stress-induced phase transformation from an ordered body-centred cubic parent phase to an ordered orthorhombic martensite, allows for a recoverable strain exceeding 7%. This functionality persists across a broad range of temperatures, from deep cryogenic 4.2 K to above room temperature, arising from an unconventional temperature dependence of transformation stresses. Below a certain threshold during cooling, the critical transformation stress inversely correlates with temperature. We interpret this behaviour from the perspective of a temperature-dependent anomalous lattice instability of the parent phase. This alloy holds potential in everyday appliances requiring flexible strain accommodation, as well as components designed for extreme environmental conditions such as deep space and liquefied gases.

  11. Martensitic transformation and shape memory effect in Mn-rich Cu-Mn-Al alloys Invited Peer-reviewed

    Tatsuya Ito, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    Shape Memory and Superelasticity　11　167-175　2025/02/04

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s40830-025-00519-y 　

    ISSN： 2199-384X

    eISSN： 2199-3858

  12. An efficient experimental approach for high-throughput discovery of novel Ti-based shape-memory alloys Peer-reviewed

    Yuxin Song, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    Journal of Materials Research and Technology　30　3220-3225　2024/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.jmrt.2024.04.051 　

    ISSN： 2238-7854

  13. 【Editors' Highlights】Non-Hookean large elastic deformation in bulk crystalline metals Peer-reviewed

    Sheng Xu, Takumi Odaira, Shunsuke Sato, Xiao Xu, Toshihiro Omori, Stefanus Harjo, Takuro Kawasaki, Hanuš Seiner, Kristýna Zoubková, Yasukazu Murakami, Ryosuke Kainuma

    Nature Communications　13　(1)　2022/09/27

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-022-32930-9 　

    eISSN： 2041-1723

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    Abstract Crystalline metals can have large theoretical elastic strain limits. However, a macroscopic block of conventional crystalline metals practically suffers a very limited elastic deformation of &lt;0.5% with a linear stress–strain relationship obeying Hooke’s law. Here, we report on the experimental observation of a large tensile elastic deformation with an elastic strain of &gt;4.3% in a Cu-based single crystalline alloy at its bulk scale at room temperature. The large macroscopic elastic strain that originates from the reversible lattice strain of a single phase is demonstrated by in situ microstructure and neutron diffraction observations. Furthermore, the elastic reversible deformation, which is nonhysteretic and quasilinear, is associated with a pronounced elastic softening phenomenon. The increase in the stress gives rise to a reduced Young’s modulus, unlike the traditional Hooke’s law behaviour. The experimental discovery of a non-Hookean large elastic deformation offers the potential for the development of bulk crystalline metals as high-performance mechanical springs or for new applications via “elastic strain engineering.”

  14. Flexible and tough superelastic Co-Cr alloys for biomedical applications International-journal Peer-reviewed

    Takumi Odaira, Sheng Xu, Kenji Hirata, Xiao Xu, Toshihiro Omori, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Makoto Nagasako, Stefanus Harjo, Takuro Kawasaki, Lucie Bodnárová, Petr Sedlák, Hanuš Seiner, Ryosuke Kainuma

    Advanced Materials　34　(27)　e2202305　2022/05/09

    DOI： 10.1002/adma.202202305 　

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    The demand for biomaterials has been increasing along with the increase in the population of elderly people worldwide. The mechanical properties and high wear resistance of metallic biomaterials make them well-suited for use as substitutes or as support for damaged hard tissues. However, unless these biomaterials also have a low Young's modulus similar to that of human bones, bone atrophy inevitably occurs. Because a low Young's modulus is typically associated with poor wear resistance, it is difficult to realize a low Young's modulus and high wear resistance simultaneously. Also, the superelastic property of shape-memory alloys makes them suitable for biomedical applications, like vascular stents and guide wires. However, due to the low recoverable strain of conventional biocompatible shape-memory alloys, the demand for a new alloy system is high. The novel body-centered-cubic cobalt-chromium-based alloys in this work provide a solution to both of these problems. The Young's modulus of <001>-oriented single-crystal cobalt-chromium-based alloys is 10-30 GPa, which is similar to that of human bone, and they also demonstrate high wear and corrosion resistance. They also exhibit superelasticity with a huge recoverable strain up to 17.0%. For these reasons, the novel cobalt-chromium-based alloys can be promising candidates for biomedical applications.

  15. Overcoming the trade-off between stretch formability and heat resistance in magnesium via alloying dilute neodymium Peer-reviewed

    Sijia Hu, Qinghuan Huo, Chunyu Wang, Yuxiu Zhang, Zhirou Zhang, Sheng Xu, Xuyue Yang

    Journal of Alloys and Compounds　895　162666　2022/02

    Publisher: Elsevier BV

    DOI： 10.1016/j.jallcom.2021.162666 　

    ISSN： 0925-8388

  16. 【Featured Article】Elastocaloric switching effect induced by reentrant martensitic transformation Peer-reviewed

    Takumi Odaira, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    Applied Physics Reviews　7　(3)　031406　2020/09

    Publisher: AIP Publishing

    DOI： 10.1063/5.0007753 　

    eISSN： 1931-9401

  17. Negative Poisson's ratio in Heusler-type Cu–Al–Mn shape memory alloy Peer-reviewed

    Sheng Xu, Ryota Tsukuda, Mi Zhao, Xiao Xu, Toshihiro Omori, Kyosuke Yoshimi, Ryosuke Kainuma

    Scripta Materialia　177　74-78　2020/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.scriptamat.2019.10.015 　

    ISSN： 1359-6462

  18. Large [001] single crystals via abnormal grain growth from columnar polycrystal Peer-reviewed

    Sheng Xu, Tomoe Kusama, Xiao Xu, Haiyou Huang, Toshihiro Omori, Jianxin Xie, Ryosuke Kainuma

    Materialia　6　100336　2019/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.mtla.2019.100336 　

    ISSN： 2589-1529

  19. Formation mechanism and control of aluminum layer thickness fluctuation in embedded aluminum–steel composite sheet produced by cold roll bonding process Peer-reviewed

    Chun-yang WANG, Yan-bin JIANG, Jian-xin XIE, Sheng XU, De-jing ZHOU, Xiao-jun ZHANG

    Transactions of Nonferrous Metals Society of China　27　(5)　1011-1018　2017/05

    Publisher: Elsevier BV

    DOI： 10.1016/s1003-6326(17)60118-3 　

    ISSN： 1003-6326

  20. 【Feature Paper】Dynamic recovery and superelasticity of columnar-grained Cu–Al–Mn shape memory alloy Peer-reviewed

    Sheng Xu, Haiyou Huang, Jianxin Xie, Yuta Kimura, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    Metals　7　(4)　141　2017/04/15

    DOI： 10.3390/met7040141 　

    ISSN： 2075-4701

    eISSN： 2075-4701

  21. Giant elastocaloric effect covering wide temperature range in columnar-grained Cu71.5Al17.5Mn11 shape memory alloy Peer-reviewed

    Sheng Xu, Hai-You Huang, Jianxin Xie, Shouhei Takekawa, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    APL Materials　4　(10)　106106　2016/10

    Publisher: AIP Publishing

    DOI： 10.1063/1.4964621 　

    eISSN： 2166-532X

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Misc. 11

  1. In-situ Neutron Diffraction Studies of Elastic and Superelastic Alloys Invited Peer-reviewed

    Sheng Xu

    36　(2)　70-73　2026/05

  2. In-situ neutron diffraction empowers the development of new titanium superelastic alloys Invited

    Sheng Xu, Yuxin Song, Xiao Xu, Toshihiro Omori, Takuro Kawasaki, Ryoji Kiyanagi, Stefanus Harjo, Wu Gong, Ryosuke Kainuma

    J-PARC MLF Annual Report 2024　2　35-37　2026/02

  3. 広い温度範囲で動作する新しいTi-Al基形状記憶合金の開発 Invited

    許勝

    青葉工学振興会機関誌「翠巒」　40　4　2025/12

  4. 弾性異方性を利用した新奇弾性合金の開発 Invited Peer-reviewed

    許勝

    日本金属学会会報「まてりあ」　64　(10)　665-668　2025/10

  5. 約 400 度の温度変化でも超弾性を示す軽量な形状記憶合金を開発 ～宇宙環境や生体用途での利用に期待～ Invited

    許勝

    学際研広報誌「FRISニュース」　(20)　2025/09

  6. 擬弾性から究極的な真弾性へ－巨大弾性ひずみを示すバルク銅合金の開発－ Invited

    許勝, 大森俊洋, 貝沼亮介

    金属　94　(9)　57-64　2024/09

  7. その場中性子回折による金属材料における巨大弾性歪み現象の解明 Invited

    許勝, 許皛, 大森俊洋, 貝沼亮介, ハルヨステファヌス, 川崎卓郎

    中性子産業利用推進協議会 季報「四季」　58　1-6　2023/03

  8. Study on large elastic deformation in bulk metal by in situ neutron diffraction Invited

    Sheng Xu, Takumi Odaira, Xiao Xu, Toshihiro Omori, Takuro Kawasaki, Stefanus Harjo, Ryosuke Kainuma

    J-PARC MLF Annual Report 2022　2　4-6　2023/01

  9. 【Front Cover】Tough yet flexible superelastic alloys meet biomedical needs Invited

    Xiao Xu, Takumi Odaira, Sheng Xu, Kenji Hirata, Toshihiro Omori, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Makoto Nagasako, Ryosuke Kainuma, Stefanus Harjo, Takuro Kawasaki, Lucie Bodnárová, Petr Sedlák, Hanuš Seiner

    ADVANCED MATERIALS & PROCESSES　180　(7)　35-37　2022/10

    ISSN： 0882-7958

    eISSN： 2161-9425

  10. Novel elastocaloric effects in Co-based Heusler alloys Invited

    Xiao Xu, Takumi Odaira, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    16　(5)　239-245　2021/10

  11. Cryogenic superelasticity and concomitant elastocaloric effect Invited

    Kodai Niitsu, Sheng Xu, Yuta Kimura, Toshihiro Omori, Ryosuke Kainuma

    Materia Japan　58　(1)　44-46　2019/01

    Publisher: Japan Institute of Metals

    DOI： 10.2320/materia.58.44 　

    ISSN： 1340-2625

    eISSN： 1884-5843

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Books and Other Publications 1

  1. 革新的冷却技術 : メカニズムから素子・材料・システム開発まで

    許皛, 大平拓実, 許勝, 大森俊洋, 貝沼亮介他

    エヌ・ティー・エス　2024/01

    ISBN: 9784860438548

Presentations 62

  1. Texture evolution through oriented growth and abnormal grain growth in a FeMnAlNi shape memory alloy

    Kerui Song, Sheng Xu, Ryosuke Kainuma, Toshihiro Omori

    9th International Conference on Recrystallization and Grain Growth

  2. A cryogenic titanium-based superelastic alloy

    2026/02/16

  3. その場中性子回折を用いた単結晶弾性・超弾性合金の研究 Invited

    許勝

    日本中性子科学会第25回年会　2025/11/27

  4. Fe-Mn-Al-Ni形状記憶合金の時効による相安定性の変化と回復力の発生

    高橋希陽太, 許勝, 貝沼亮介, 大森俊洋

    日本形状記憶合金協会（ASMA）第15回SMAシンポジウム　2025/11/13

  5. Ti–Al–Cr合金の低温超弾性挙動

    許勝, 宋雨鑫, 許皛, 大森俊洋, 川崎卓郎, ゴンウー, ハルヨステファヌス, 貝沼亮介

    日本金属学会2025年秋期（第177回）講演大会　2025/09/18

  6. Ti–Al–Cr超弾性合金単結晶における結晶構造解析

    宋雨鑫, 許勝, 許皛, 大森俊洋, 川崎卓郎, 鬼柳亮嗣, 貝沼亮介

    日本金属学会2025年秋期（第177回）講演大会　2025/09/18

  7. Mo–Ti–C合金における破面形態と特性の関係に関するデータ駆動型解析

    Xinyu Yan, 許勝, 大森俊洋, 吉見享祐

    日本金属学会2025年秋期（第177回）講演大会　2025/09/18

  8. 【優秀ポスター賞】Cu-Al-Mn合金における粒界移動度の実験的評価

    久保稀央, 許勝, 大森俊洋, 貝沼亮介

    日本金属学会2025年秋期（第177回）講演大会　2025/09/18

  9. 高導電性を有するCu-Zn-Al-Ni合金の弾性変形挙動

    李炯録, 許勝, 大平拓実, 谷口兼一, 許皛, 貝沼亮介, 大森俊洋

    日本金属学会2025年秋期（第177回）講演大会　2025/09/17

  10. A lightweight yet strong Ti-Al-based superelastic alloy operating across a wide temperature range Invited

    Sheng Xu, Yuxin Song, Shunsuke Sato, Inho Lee, Xiao Xu, Toshihiro Omori, Makoto Nagasako, Takuro Kawasaki, Ryoji Kiyanagi, Stefanus Harjo, Wu Gong, Tomáš Grabec, Pavla Stoklasová, Ryosuke Kainuma

    International Conference on Martensitic Transformations (ICOMAT2025)　2025/09/12

  11. Specific heat and entropy change during martensitic transformation in NiMnTi alloys

    Tomoya Miyakawa, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    2025/09/06

  12. Elastocaloric effect covering wide temperature range in a Ti-Al-Cr shape memory alloy

    Yuxin Song, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    International Conference on Martensitic Transformations (ICOMAT 2025)　2025/09/05

  13. Shape memory alloys for biomedical application Invited

    Sheng Xu

    FRIS-KKU Joint Symposium 2025　2025/07/25

  14. 軽量Ti-Al-Cr形状記憶合金における弾性熱量効果

    宋雨鑫, 許勝, 宋克睿, 大森俊洋, 貝沼亮介

    日本金属学会2025年春期（第176回）講演大会　2025/03/09

  15. The role of controllable primary recrystallization microstructure on secondary recrystallization in polycrystalline FeMnAlNi shape memory alloy

    Kerui Song, 許勝, Yuxin Song, 貝沼亮介, 大森俊洋

    日本金属学会2025年春期（第176回）講演大会　2025/03/09

  16. 機械学習によるMo-Ti-C合金の断面形態定量解析

    Xinyu Yan, 許勝, 金子昂弘, 大森俊洋, 吉見享佑

    日本金属学会2025年春期（第176回）講演大会　2025/03/09

  17. The evolution of grain orientation during primary and secondary recrystallization in FeMnAlNi superelastic alloy

    Kerui Song, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    The 8th Symposium for the Core Research Clusters for Materials Science and Spintronics　2024/11/21

  18. 単結晶Cu-Al-Mn超弾性合金における機械的性質の結晶方位依存性の全体像

    淺野圭佑, 喜瀬純男, 許勝, 大森俊洋, 荒木慶一

    日本銅学会第64回講演大会　2024/10/18

  19. 拡散マルチプル法とマイクロビッカース法を用いた Ti-Al-Cr 系形状記憶合金の開発

    宋雨鑫, 許勝, 大森俊洋, 貝沼亮介

    日本形状記憶合金協会（ASMA）第14回SMAシンポジウム　2024/10/03

  20. Texture formation of polycrystalline FeMnAlNi shape memory alloy

    Kerui Song, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    International Materials Science and Engineering Congress - MSE 2024　2024/09/24

  21. Ti-Al-Cr系における拡散対法とマイクロビッカース法を用いた形状記憶合金の探索

    宋雨鑫, 許勝, 大森俊洋, 貝沼亮介

    日本金属学会2024年秋期（第175回）講演大会　2024/09/19

  22. Texture formation of polycrystalline FeMnAlNi shape memory alloy

    Kerui Song, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    日本金属学会2024年秋期（第175回）講演大会　2024/09/18

  23. Cu-Al-Mn 超弾性合金単結晶の臨界応力に及ぼすMn 量の影響

    谷川由果, 許勝, 伊東達矢, Wu Gong, Stefanus Harjo, 大森俊洋, 貝沼亮介

    日本金属学会2024年秋期（第175回）講演大会　2024/09/18

  24. Fe-Mn-Al-Ni合金の相変態挙動に及ぼす低温時効の影響

    太田竜資, 赤嶺大志, 許 勝, 大森俊洋

    日本金属学会2024年秋期（第175回）講演大会　2024/09/18

  25. Fe-Mn-Al-Ni 形状記憶合金の時効による相安定性の変化

    高橋希陽太, 許勝, 大森俊洋, 貝沼 亮介

    日本金属学会2024年秋期（第175回）講演大会　2024/09/18

  26. 【Best Poster Presentation】High-strength Cu-Al-Mn superelastic alloys

    Yuka Tanikawa, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    13th European Symposium on Martensitic Transformations (ESOMAT2024)　2024/08/29

  27. Shape memory effect at low temperatures in Cu-Al-Mn alloys

    Toshihiro Omori, Shunsuke Sato, Sheng Xu, Xiao Xu, Ryosuke Kainuma

    SMST (Shape Memory and Superelastic Technologies) Conference and Exposition 2024　2024/05/08

  28. Ni50Mn50-xTix系合金におけるマルテンサイト変態挙動

    宮川寅矢, 許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会2024年春期（第174回）講演大会　2024/03/15

  29. CoCr-based superelastic alloys with low Young’s modulus for biomedikal applications

    Xiao Xu, Takumi Odaira, Sheng Xu, Kenji Hirata, Toshihiro Omori, Kosuke Ueki, KYosuke Ueda, Tkayuki Narushima, Makoto Nagasako, Stefanus Hrjo, Takuro Kawasaki, Lucie Bodharova, Petri Sedlak, Hanus Seiner, Ryosuke Kainuma

    153th Annual Meeting of The Minerals, Metals & Materials Society (TMS2024)　2024/03/05

  30. Elastocaloric switching effect in CoCrAlSi shape memory alloys with reentrant marteisitic transformation behavior

    Xiao Xu, Takumi Odaira, Sheng Xu, Toshihiro Omori, Ryosuke Kainuma

    MRM2023/IUMRS-ICA2023　2023/12/13

  31. Co-Cr-Al-Si合金の高い弾性異方性と単結晶における低いヤング率

    許皛, 大平拓実, 許勝, 平田研二, 大森俊洋, 植木洸輔, 上田恭介, 成島尚之, 長迫実, Harjo Stefanus, 川崎卓郎, Bodnarova Lucie, Sedlak Petr, Seiner Hanus, 貝沼亮介

    日本金属学会2023年秋期（第173回）講演大会　2023/09/22

  32. 【優秀ポスター賞】Cu-Al-Mn合金における極低温弾性熱量効果の直接測定

    許勝, 宋雨鑫, 伊東達矢, 川崎卓郎, ハルヨステファヌス、ゴンウー, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会2023年秋期（第173回）講演大会　2023/09/19

  33. 【優秀ポスター賞】Cu-Al-Mn合金単結晶におけるサブグレインが超弾性疲労特性に与える影響

    谷川由果, 許勝, 大森俊洋, 貝沼亮介

    日本金属学会2023年秋期（第173回）講演大会　2023/09/19

  34. Elastocaloric effect at near room temperature in a Ti-Al-based shape memory alloy

    Sheng Xu, Yuxin Song, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    The 15th World Conference on Titanium (Ti-2023)　2023/06/14

  35. Stress-induced martensitic transformation in a Ti-Al-based shape memory alloy

    Yuxin Song, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    The 15th World Conference on Titanium (Ti-2023)　2023/06/14

  36. ホイスラー型バルクCu-Al-Mn合金における巨大弾性変形

    許勝, 大平拓実, 佐藤駿介, 許皛, 大森俊洋, ハルヨ ステファヌス, 川崎卓郎, Hanuš Seiner, Kristýna Zoubková, 村上恭和, 貝沼亮介

    日本金属学会2023年春期（第172回）講演大会　2023/03/09

  37. Observation of non-Hookean huge elastic deformation in a bulk Heusler-type Cu-Al-Mn alloy

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    2022 Materials Research Society (MRS) Fall Meeting　2022/11/29

  38. Novel Co-Al-Si shape memory alloy with B2-structured parent phase

    2022 Materials Research Society (MRS) Fall Meeting　2022/11/29

  39. 【Best Poster Award】A lightweight Ti-Al-based shape memory alloy with B2-ordered structure

    Yuxin Song, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    2022 Materials Research Society (MRS) Fall Meeting　2022/11/30

  40. A lightweight Ti-Al-Cr shape memory alloy showing large superelastic strain

    Yuxin Song, Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    The 6th Symposium for the Core Research Clusters for Materials Science and Spintronics, and the 5th Symposium on International Joint Graduate Program in Materials Science　2022/10/24

  41. 低ヤング率を有するCo-Cr-Al-Si 超弾性合金

    許皛, 大平拓実, 許勝, 平田研二, 大森俊洋, 植木洸輔, 上田恭介, 成島尚之, 長迫実, Stefanus Harjo, 川崎卓郎, Lucie Bodnárová, Petr Sedlák, Hanuš Seiner, 貝沼亮介

    日本金属学会2022年秋期（第171回）講演大会　2022/09/23

  42. Co-Al-Si合金におけるB2/L10マルテンサイト変態と超弾性

    持丸駿哉, 伊東達矢, 許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会2022年秋期（第171回）講演大会　2022/09/23

  43. Cu-Al-Mn 形状記憶合金の異常粒成長挙動に及ぼすミクロ組織の影響

    李炯録, 許勝, 大森俊洋, 貝沼亮介

    日本金属学会2022年秋期（第171回）講演大会　2022/09/22

  44. Ti-Al-Cr系合金における超弾性効果

    宋雨鑫, 許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会2022年秋期（第171回）講演大会　2022/09/22

  45. 【Most Viewed Presentation Award】Auxetic behavior in single-crystalline and texture-controlled poly-crystalline Cu-Al-Mn-based shape memory alloys

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    16th International Conference on Martensitic Transformation (ICOMAT2022)　2022/03/18

  46. Abnormal behavior in elastocaloric effect at low temperatures in Co-Cr-Al-Si alloys

    T. Odaira, S. Xu, X. Xu, T. Omori, R. Kainuma

    16th International Conference on Martensitic Transformation (ICOMAT2022)　2022/03/17

  47. A combinatorial approach to investigate abnormal grain growth behavior in Cu-Al-Mn shape memory alloys

    H. Lee, S. Xu, T. Omori, R. Kainuma

    151st Annual Meeting of The Minerals, Metals & Materials Society (TMS2022)　2022/02/27

  48. Orientation-designed large single-crystal Cu-Al-Mn alloys by abnormal grain growth and their enhanced functional properties Invited

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    150th Annual Meeting of The Minerals, Metals & Materials Society (TMS2021)　2021/03/15

  49. Co-Cr-Al-Si合金の極低温における超弾性特性

    大平拓実, 許勝, 許皛, 大森俊洋, 貝沼亮介

    第18回日本金属学会東北支部研究発表大会「21世紀を支える構造材料」　2020/11/16

  50. 集合組織制御したCu-Al-Mn基合金におけるオーセチック特性

    許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会2020年春期（第166回）講演大会　2020/03/17

  51. Co-Cr-Al-Si合金の低温における特異な弾性熱量効果

    大平拓実, 許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会 2020年春期(第166回)講演大会　2020/03/17

  52. Negative Poisson’s ratio in Heusler-type Cu-Al-Mn-based shape memory alloys

    Sheng Xu, Ryota Tsukuda, Mi Zhao, Xiao Xu, Toshihiro Omori, Kyosuke Yoshimi, Ryosuke Kainuma

    149th Annual Meeting of The Minerals, Metals & Materials Society (TMS2020)　2020/02/23

  53. 【ASMA賞・審査員特別賞】Co-Cr-Al-Si合金の極低温における超弾性特性

    大平拓実, 許勝,許皛, 大森俊洋, 貝沼亮介

    日本形状記憶合金協会（ASMA）第12回SMAシンポジウム　2019/11/14

  54. Cu-Al-Mn合金単結晶における負のポアソン比

    許勝, 附田良太, 趙覓, 許皛, 大森俊洋, 吉見享祐, 貝沼亮介

    日本金属学会2019年秋期(第165回)講演大会　2019/09/11

  55. Cu-Al-Mn形状記憶合金における弾性熱量効果

    許勝, 許皛, 大森俊洋, 貝沼亮介, 黄海友, 謝建新

    日本金属学会2018年(第163回)秋期講演大会　2018/09/18

  56. Large <100> single crystals via abnormal grain growth from columnar polycrystal

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    11th European Symposium on Martensitic Transformation (ESOMAT2018)　2018/08/27

  57. Large <100> single crystals via abnormal grain growth from columnar polycrystal

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    2018 JOINT Symposium on the MSE for 21st century　2018/06/24

  58. Large <100> single crystals via abnormal grain growth from columnar polycrystal

    Sheng Xu, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

    2018 Russia-Japan Conference, Advanced Materials: Synthesis, Processing and Properties of Nanostructures　2018/03/22

  59. Large elastocaloric effect evidenced in Cu-Al-Mn shape memory alloys

    許勝, 許皛, 大森俊洋, 貝沼亮介

    日本金属学会東北支部第15回研究発表大会　2017/11/22

  60. Dynamic recovery and superelasticity of columnar-grained Cu-Al-Mn shape memory alloy

    許勝, 木村雄太, 許皛, 大森俊洋, 貝沼亮介, 黄海友, 謝建新

    日本金属学会2017年(第161回)秋季講演大会　2017/09/06

  61. Giant elastocaloric effect in wide temperature range in a columnar-grained Cu-Al-Mn shape memory alloy

    Sheng Xu, Haiyou Huang, Jianxin Xie

    17th International Conference in Asia of the International Union of Materials Research Societies (IUMRS-ICA 2016)　2016/10/20

  62. Superelasticity in a fiber-textured oligocrystalline Cu-Al-Mn shape memory alloy

    許勝, 草間知枝, 大森俊洋, 貝沼亮介

    日本金属学会東北支部第14回研究発表大会　2015/12/05

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Industrial Property Rights 5

  1. Cu-Al-Mn系合金

    貝沼亮介, 大森俊洋, 許勝

    Property Type: Patent

  2. Cu-Al-Mn系合金およびCu-Al-Mn系合金の製造方法

    貝沼亮介, 大森俊洋, 許勝, 附田良太

    Property Type: Patent

  3. 銅合金

    大森俊洋, 貝沼亮介, Lee Hyoungrok, 許勝

    Property Type: Patent

  4. 弾性変形に特徴を有する高導電性銅合金

    大森俊洋, 貝沼亮介, Lee Hyoungrok, 許勝

    Property Type: Patent

  5. Ti-Al系超弾性合金

    貝沼亮介, 大森俊洋, 許勝, Song Yuxin

    Property Type: Patent

Research Projects 7

  1. 省エネ化・温室効果ガス排出削減を可能にする次世代超軽量固体冷媒の開発 Competitive

    許 勝

    Offer Organization: 環境省

    System: 環境研究総合推進費

    Category: 革新型研究開発（若手枠）

    2025/04 - 2028/03

  2. Ti-Al系超弾性合金 ―酸素の役割解明による劇的特性改善― Competitive

    許 勝

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 国際共同研究加速基金(国際共同研究強化)

    Institution: 東北大学

    2024/04 - 2028/03

  3. Development of novel titanium-based superelastic alloys operationable in a wide temperature range

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2024/04 - 2028/03

  4. 格子歪みの能動的制御による二酸化炭素の高効率・高選択変換への挑戦

    許 勝, 轟 直人, 大森 俊洋

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的研究(萌芽)

    Institution: 東北大学

    2025/06 - 2027/03

  5. 巨大弾性歪みを発現するバルク銅系合金の開発とその応用 Competitive

    許 勝

    Offer Organization: 国立研究開発法人新エネルギー・産業技術総合開発機構（NEDO）

    System: 官民による若手研究者発掘支援事業（若サポ）・マッチングサポートフェーズ

    Institution: 東北大学

    2022/10 - 2024/09

  6. 極低温で利用できる巨大弾性バルク合金の開発 －水素社会を支える金属シール材料－

    許 勝

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 東北大学

    2022/04 - 2024/03

    More details Close

    本年度においては、サイクル熱処理により作製されたバルク単結晶試験片を使用し、室温から4.2Kの極低温までの機械試験を行い、弾性歪みやヤング率を含む合金の弾性特性が系統的に評価された。その結果、ヤング率の温度依存性が小さいことが明らかになった一方、低温になるほど応力誘起マルテンサイト変態が生じ、純粋な弾性歪みが低下することが確認された。室温から極低温までの弾性定数の測定結果からは、無応力状態でマルテンサイト変態の先駆現象である弾性軟化母相が見られず、温度変化によっても安定性は保たれることが分かった。これは、極低温域を含む広い温度範囲において低応力で低ヤング率と比較的大きな弾性歪み（＞1%@150K）が示されることを意味する。高応力下ではマルテンサイト変態が誘起されたが、除荷によって逆変態が起こり、極低温で擬弾性による大きな可逆歪みが生じることが明らかとなった。また、低温での擬弾性変形では良好な繰り返し特性が示される。合金設計によって母相の相安定性を向上させることで、低温での応力誘起マルテンサイト変態を抑制できる組成が見出されたが、高温相平衡の観点からその組成では異常粒成長による単結晶の作製が不利であることが分かった。以上の結果から、Cu-17Al-14Mn (at%)合金は低ヤング率および高復元力が要求される極低温シール材に素材として有望であると推測される。今後としては、企業と連携し、シール材の試作とシーリング特性の評価等を進めていき、極低温シール材への応用可能性を検討する予定である。

  7. Elastocaloric effect at small scales towards micro-cooling device

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for JSPS Fellows

    Institution: Tohoku University

    2018/04 - 2020/03

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Teaching Experience 1

  1. 創造工学研修　東北大学工学部

Media Coverage 13

  1. 次世代固体冷媒向け合金 広い温度帯で高効率冷却 東北大ら開発

    環境新聞web

    2026/05

    Type: Newspaper, magazine

  2. 広い温度域で動作する次世代固体冷媒を開発－従来の理論スケーリングを超える弾性熱量効果を発見－

    東北大学2026年プレリリース・研究成果web

    2026/04

    Type: Other

  3. 東北大など／「形状記憶チタン・アルミ合金」開発／４００度の温度 変化でも超弾性維持

    日刊鉄鋼新聞web

    2025/03

    Type: Newspaper, magazine

  4. Revolutionary Lightweight Alloy Engineered to Withstand Extreme Temperatures

    ScienMag

    2025/02

    Type: Internet

  5. Superelastic alloy that functions in extreme temperatures could aid space exploration

    Tech Xplore

    2025/02

    Type: Internet

  6. Lightweight Titanium Alloy Developed for Function at Extreme Temperatures

    Technology Networks

    2025/02

    Type: Internet

  7. Superelastic titanium alloy has potential for space missions

    Nature　「News＆Views」

    2025/02

    Type: Newspaper, magazine

  8. 東北大、原子力機構・J-PARC センターなどと約400 度の温度変化でも 超弾性を示す軽量な形状記憶合金を開発

    日本経済新聞web

    2025/02

    Type: Newspaper, magazine

  9. 約400度の温度変化でも超弾性を示す軽量な形状記憶合金を開発 ～宇宙環境や生体用途での利用に期待～

    東北大学2025年プレリリース・研究成果web

    2025/02

    Type: Other

  10. 4.3％を超える巨大弾性歪みを示す金属を開発

    加工技術研究会　コンバーテック　2022年11月号（Spotlight特集）フィルム・シートとマテリアル

    2022/11

    Type: Newspaper, magazine

  11. 4.3％を超す巨大弾性歪みを示す金属、東北大が開発

    TECH＋（テックプラス）web

    2022/10/14

    Type: Internet

  12. 東北大、原子力機構・J-PARCセンター・九大などとの共同研究によりバルク単結晶同系合金において弾性歪み＞を実現

    日本経済新聞web

    2022/10/13

    Type: Internet

  13. 4.3％を超える巨大弾性歪みを示す金属を開発－大きな弾性変更の実現で高性能ばね材等への応用に期待－

    東北大学2022年プレリリース・研究成果web

    2022/10

    Type: Other

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