Harjo Stefanus

ハルヨステファヌス | Harjo Stefanus

Affiliation and department：

Research field (1)： Structural and functional materials

Research theme for competitive and other funds (9)：

2018 - 2023 Materials science of millefeuille structure (Management group)
2018 - 2023 Solving kink formation/strengthening mechanism through precise structure analyses
2019 - 2021 Elucidation of the mechanism to control the excellent high temperature properties of nano-microstructured high entropy alloys
2015 - 2020 Materials design based on fundamental understanding of peculiar mechanical properties of bulk nanostructure metals
2014 - 2018 Establishment of procedures to obtain the maximum TRIP effect

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Papers (327)：

Wenqi Mao, Wu Gong, Stefanus Harjo, Satoshi Morooka, Si Gao, Takuro Kawasaki, Nobuhiro Tsuji. In situ neutron diffraction revealing the achievement of excellent combination of strength and ductility in metastable austenitic steel by grain refinement. Journal of Materials Science & Technology. 2024
Koji Hagihara, Tsuyoshi Mayama, Michiaki Yamasaki, Stefanus Harjo, Toko Tokunaga, Kazuki Yamamoto, Mika Sugita, Kairi Aoyama, Wu Gong, Soya Nishimoto. Contributions of multimodal microstructure in the deformation behavior of extruded Mg alloys containing LPSO phase. International Journal of Plasticity. 2024. 173
Yongjie Zhang, Kento Marusawa, Kohei Kudo, Satoshi Morooka, Stefanus Harjo, Goro Miyamoto, Tadashi Furuhara. Multi-aspect Characterization of Low-temperature Tempering Behaviors in High-carbon Martensite. ISIJ International. 2024. 64. 2. 245-256
Mio Nakamoto, Michinaka Sugano, Toru Ogitsu, Masahiro Sugimoto, Ryo Taniguchi, Kiyoshige Hirose, Takuro Kawasaki, Wu Gon, Stefanus Harjo, Satoshi Awaji, et al. Internal Strain Measurement by Neutron Diffraction Under Transverse Compressive Stress for Nb3Sn Wires With and Without Cu-Nb Reinforcement. IEEE Transactions on Applied Superconductivity. 2024. 34. 5
Motomichi Koyama, Takayuki Yamashita, Satoshi Morooka, Zhipeng Yang, Rama Srinivas Varanasi, Tomohiko Hojo, Takuro Kawasaki, Stefanus Harjo. Hierarchical Deformation Heterogeneity during Lüders Band Propagation in an Fe-5Mn-0.1C Medium Mn Steel Clarified through in situ Scanning Electron Microscopy. Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 2024. 110. 3. 205-216

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MISC (349)：

鬼柳善明, 及川健一, 篠原武尚, 甲斐哲也, HARJO S., 松本吉弘, 渡辺賢一, 佐藤博隆, 森戸茂一, PHAM A.H., et al. Study on Japanese swords produced from old sword to modern age by using the neutron imaging. 日本中性子科学会年会講演概要集. 2023. 23rd
及川健一, 土川雄介, ハルヨステファヌス, 松本吉弘, 鬼柳善明. Small gauge volume diffraction test of a Japanese sword. 量子ビームサイエンスフェスタ(Web). 2023. 2022
許きょう, 許きょう, 大平拓実, 大平拓実, 許勝, 平田研二, 平田研二, 大森俊洋, 植木洸輔, 植木洸輔, et al. 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. 日本金属学会講演大会(Web). 2023. 173rd
XU Xiao, XU Xiao, 大平拓実, 大平拓実, XU Sheng, 平田研二, 平田研二, 大森俊洋, 植木洸輔, 植木洸輔, et al. Co-Cr-Al-Si superelastic alloys with low Young’s modulus. 材料とプロセス(CD-ROM). 2022. 35. 2
熊谷正芳, HARJO Stefanus, 松野崇, 黒田雅利, 秋田貢一. Stress Analysis Using Neutron Diffraction on Repeatedly Plastic Deformed Austenitic Stainless Steel. X線材料強度に関するシンポジウム講演論文集. 2022. 56th

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Lectures and oral presentations (45)：

In-situ neutron diffraction study on tensile deformation behaviors of UFG Fe-24Ni-6Al-0.4C alloy containing B2 intermetallic compounds
(日本金属学会講演概要(CD-ROM) 2018)
9aPS-17 Large elastic deformation in Fe_3Pt which shows second-order-like martensitic transformation
(Meeting abstracts of the Physical Society of Japan 2014)
OS0409 Quantitative Analysis of Tensile Deformation Behavior Based on Theory of Elasticity for α-β Titanium Alloys
(M&M材料力学カンファレンス 2013)
OS1430 Residual Stress Measurement of Dissimilar Metal Welded Joint in High Temperature by Neutron Diffraction
(M&M材料力学カンファレンス 2013)
Powder neutron diffraction study of phase E
(日本鉱物科学会年会講演要旨集 2013)

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Professional career (1)：

PhD (Ibaraki University)

Work history (1)：

2005/04 - 現在 Japan Atomic Energy Agency

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