Takakuwa Osamu

タカクワオサム | Takakuwa Osamu

Affiliation and department：
Job title： Associate Professor
Homepage URL (2)： http://hyoka.ofc.kyushu-u.ac.jp/search/details/K006497/index.html , http://db.tohoku.ac.jp/whois/detail/e7739b8b2cbea8a68c1f0db4c20bab17.html

Research field (2)： Machine materials and mechanics , Structural and functional materials

Research keywords (7)：水素脆化 , 破壊力学 , 材料強度学 , 金属疲労 , 表面改質 , 第一原理計算 , シンクロトロン放射光

Research theme for competitive and other funds (8)：

2023 - 2026 相変態×水素誘起き裂発生・進展現象解明:高分解能X線CTと局所XRDの援用
2020 - 2023 熱活性過程で理解する水素環境下疲労き裂進展加速メカニズム
2015 - 2017 New material creation following biomineralization - Challenge to control lime scale -
2015 - 2017 Evaluation of hydrogen distribution at vicinity of a crack employing a local strain measurement
2013 - 2015 A method to evaluate local hydrogen content near surface using an indentation test

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Papers (89)：

Junichiro Moriyama, Osamu Takakuwa, Masatake Yamaguchi, Yuhei Ogawa, Kaneaki Tsuzaki. The contribution of Cr and Ni to hydrogen absorption energy in Fe-Cr-Ni austenitic systems: A first-principles study. Computational Materials Science. 2024. 232. 112650-112650
Yuhei Ogawa, Osamu Takakuwa, Kaneaki Tsuzaki. Solid-solution hardening by hydrogen in Fe-Cr-Ni-based austenitic steel: Temperature and strain rate effects. Materials Science and Engineering: A. 2023. 145281-145281
Osamu Takakuwa, Yuhei Ogawa, Ryunosuke Miyata. Antagonistic fatigue crack acceleration/deceleration phenomena in Ni-based superalloy 718 under hydrogen-supply. Scientific Reports. 2023. 13. 6804
Yuhei Ogawa, Haruki Nishida, Osamu Takakuwa, Kaneaki Tsuzaki. Hydrogen-enhanced deformation twinning in Fe-Cr-Ni-based austenitic steel characterized by in-situ EBSD observation. Materials Today Communications. 2023. 105433-105433
Yuhei Ogawa, Kohei Noguchi, Osamu Takakuwa. Criteria for hydrogen-assisted crack initiation in Ni-based superalloy 718. Acta Materialia. 2022. 117789-117789

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MISC (3)：

Osamu Takakuwa, Hitoshi Soyama. Enhancing the Resistance to Hydrogen Embrittlement in Stainless Steel by Cavitation Peening. Metal Finishing News. 2013. 14. 4. 58-61
O. Takakuwa, H. Soyama. Enhancing the Resistance to Fatigue Crack Growth in Steel Accelerated due to Hydrogen Charging by Cavitation Peening. Metal Finishing News. 2013. 14. 4. 62-65
Yoshiteru Aoyagi, Osamu Takakuwa, Hitoshi Soyama. Crystal Plasticity Simulation on Fatigue Crack Propagation in Steel and Effect of Residual Stress by Cavitation Peening. Metal Finishing News. 2012. 13. 3. 58-60

Books (2)：

(1) Advanced Experimental and Numerical Techniques for Cavitation Erosion Prediction
2014
水素利用技術集成Vol. 4
2014 ISBN:9784864690829

Lectures and oral presentations (79)：

転位-水素相互作用の熱活性化過程に着目した低炭素鋼の水素助長疲労き裂進展メカニズム
(日本鉄鋼協会第186回秋季講演大会 2023)
第一原理計算を用いたFe-Cr-Niオーステナイト合金中への水素固溶特性の検討:平均および局所水素濃度に与えるCr・Ni原子の影響
(日本鉄鋼協会第186回秋季講演大会 2023)
シンクロトロン放射光によるオーステナイト鋼のひずみ誘起マルテンサイト変態の3次元その場観察
(日本鉄鋼協会第186回秋季講演大会 2023)
3D in situ observation for strain-induced martensitic transformation in austenitic steel by synchrotron X-ray
(FEMS EUROMAT23 2023)
First-principles study on the hydrogen absorption energy in Fe-Cr-Ni austenitic systems: Effect of Cr and Ni content
(FEMS EUROMAT23 2023)

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Professional career (1)：

Work history (5)：

2018/03 - 現在 Kyushu University Faculty of Engineering, Department of Mechanical Engineering
2018/11 - 2021/03 National Institute of Advanced Industrial Science and Technology
2016/10 - 2018/02 九州大学水素材料先端科学研究センター特任准教授
2012/04 - 2016/09 Tohoku University Graduate School of Engineering, Department of Finemechanics, Materials Physics and Engineering,Intelligent Sensing of Materrials Assistant Professor
2010/04 - 2012/03 Japan Society for the Promotion of Science

Committee career (10)：

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Awards (9)：

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Association Membership(s) (5)：

日本鉄鋼協会 , 日本材料学会 , 日本機械学会 , 日本高圧力技術協会 , 溶接学会

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