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J-GLOBAL ID：201701014818932261   Update date: Jun. 23, 2024

Hojo Tomohiko

ホウジョウ トモヒコ | Hojo Tomohiko
Affiliation and department：
Tohoku Gakuin University Faculty of Engineering Department of Mechanical Engineering and Intelligent Systems

About Tohoku Gakuin University Faculty of Engineering Department of Mechanical Engineering and Intelligent Systems


Job title： Associate Professor
Research field  (2)： Structural and functional materials ,  Machine materials and mechanics
Research theme for competitive and other funds  (4)：
  • 2019 - 2024 Effect of stress on hydrogen trapping state and elucidation of hydrogen embrittlement
  • 2020 - 2023 放射光・FEMを活用した第三世代超高張力鋼の損傷挙動の解明と逆問題解析への発展
  • 2018 - 2021 Improvement of hydrogen embrittlement resistance by thermomechanical processing in ultrahigh-strength TRIP-aided steels
  • 2018 - 2021 Investigation of secondary fracture mechanism at sheared edge of sheet metal through microstructure evaluation and FEM analysis
Papers (155)：
  • Takashi Matsuno, Yuya Ueda, Tomoya Takahashi, Takayuki Hama, Tomohiko Hojo, Yuki Shibayama, Mohd Ridha bin Muhamad, Yoshitaka Okitsu, Masato Takamura. Delayed fracture stress thresholds degraded by the shear punching process in ultra-high-strength steel sheets: Analysis using an in-plane bending test with numerical assimilation. Journal of Manufacturing Processes. 2024. 119. 1005-1021
  • Hiroshi Kakinuma, Sachiko Hiromoto, Tomohiko Hojo, Saya Ajito, Motomichi Koyama, Eiji Akiyama. Mechanism of local hydrogen entry into Fe sheets induced by atmospheric corrosion: Significance of potential, pH, and rust layer thickness. Corrosion Science. 2024. 232. 112043-112043
  • Tomohiko Hojo, Akihiko Nagasaka, Junya Kobayashi, Yuki Shibayama, Eiji Akiyama. Effect of Hydrogen on Fatigue Life and Fracture Morphologies of TRIP-Aided Martensitic Steels with Added Nitrogen. Metals. 2024. 14. 3. 346-346
  • Shuya Chiba, Motomichi Koyama, Tomohiko Hojo, Saya Ajito, Yuki Shibayama, Rama Srinivas Varanasi, Eiji Akiyama. Hydrogen Embrittlement Property of a 1.5 GPa Dual-Phase Steel Evaluated Using U-bending Test: A Comparison with Tempered Martensitic Steel with Identical Tensile Strength. ISIJ International. 2024. 64. 4. 706-713
  • Tomohiko Hojo, Akihiko Nagasaka, Ryusei Wakabayashi, Chihaya Tabata, Yota Kondo, Kazuma Ogasawara, Yuki Shibayama, Eiji Akiyama. Effect of Hydrogen on Tensile Shear Strength of Spot-Welded Ultrahigh-Strength TRIP-Aided Martensitic Steel Sheet. Tetsu-to-Hagane. 2024. 110. 3. 171-183
ｍore...
MISC (28)：
  • 山下 享介, 諸岡 聡, ゴン ウー, 川崎 卓郎, ハルヨ ステファヌス, 北條 智彦, 興津 貴隆, 藤井 英俊. 引張変形中その場中性子回折を用いた0.15C-5Mn鋼における残留オーステナイトと加工誘起マルテンサイトの役割のその場観察-Role of Retained Austenite and Deformation Induced Martensite in 0.15C-5Mn Steel Monitored by in-situ Neutron Diffraction Measurement during Tensile Deformation-特集号 不均一変形組織と力学特性. 鉄と鋼 / 日本鉄鋼協会 編. 2024. 110. 3. 241-251
  • Tomohiko Hojo. The observation of microstructure of polycrystalline metals by means of EBSD (electron backscattering diffraction). Journal of the Japan Society for Abrasive Technology (JSAT). 2022. 66. 9. 494-497
  • 北條智彦, 柴山由樹, 味戸沙耶, 小山元道, 秋山英二. 高強度薄鋼板の水素脆化メカニズム. 金属学会誌「まてりあ」. 2022. 61. 7. 413-418
  • 小山元道, VARANASI Rama Srinivas, 北條智彦, 山下享介, 諸岡聡, 川崎卓郎, ステファヌス ハルヨ. Multi-scale characterization of Lueders band propagation in a medium Mn steel. 材料とプロセス(CD-ROM). 2022. 35. 2
  • Eiji Akiyama, Atsushi Omori, Saya Ajito, Tomohiko Hojo, Motomichi Koyama. Corrosion Monitoring of Carbon Steels inder Humid Air Environment with Ozon Simulateing Irradiation. Zairyo-to-Kankyo. 2021. 70. 12. 448-456
ｍore...
Books (1)：
  • 機械・金属材料学
    実教出版株式会社 2015
Lectures and oral presentations  (71)：
  • 5000系アルミニウム合金の引張特性に及ぼす内在水素とひずみ速度の影響
    ((一社)軽金属学会 第141回秋期大会 2021)
  • 穴拡げ加工した自動車用高強度鋼板の遅れ破壊
    ((一社)日本機械学会 M&M2021材料力学カンファレンス 2021)
  • U曲げ加工した焼戻しマルテンサイト鋼板の水素脆化特性評価
    ((一社)日本鉄鋼協会 第182回秋季講演大会 2021)
  • 高強度低合金TRIP 鋼板の高強度化とプレス成形性向上の微細組織制御戦略
    ((一社)日本鉄鋼協会 第181回春季講演大会 討論会「塑性を起源とする損傷発達の理解とその克服・利活用」 2021)
  • Effects of Carbon Content on V-bendability of TRIP-aided Dual Phase Steel Sheets
    (2020)
ｍore...
Professional career (1)：
  • 博士(工学) (Shinshu University)
Work history (4)：
  • 2023/04 - 現在 Tohoku Gakuin University Faculty of Engineering Department of Mechanical Engineering and Intelligent Systems Associate Professor
  • 2016/12 - 2023/03 Tohoku University Institute for Materials Research Assistant Professor
  • 2013/09 - 2016/12 Iwate University Faculty of Science and Engineering Assistant Professor
  • 2006/04 - 2013/08 Tsuyama National College of Technology Department of Mechanical Engineering Assistant Professor
Awards (3)：
  • 2024/03 - The Iron and Steel Institute of Japan Sawamura Award Hierarchical Deformation Heterogeneity during Lüders Band Propagation in an Fe-5Mn-0.1C Medium Mn Steel Clarified through in situ Scanning Electron Microscopy
  • 2024/03 - 公益財団法人トーキン科学技術振興財団 トーキン財団奨励賞 自動車用超高強度鋼板の水素脆化特性評価と水素脆化メカニズムの解明
  • 2022/03 - The Japan Institute of Metals and Materials The Japan Institute of Metals and Materials Metallography Award
Association Membership(s) (6)：
The Japan Society for Technology of Plasticity ,  Japan Society of Corrosion Engineering ,  The Japan Institute of Light Materials ,  The Society of Materials Science, Japan ,  The Japan Society of Mechanical Engineering ,  The Iron and Steel Institute of Japan
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