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代替タイトル: In situ Neutron Diffraction Study on the Strength and Ductility Enhancement Mechanism of Hydrogen-charged SUS310S Stainless Steel

説明:

Recent studies have shown that the addition of hydrogen to SUS310S stainless steel (Fe–24Cr–19Ni, mass%) simultaneously enhances both strength and ductility, indicating a phenomenon contrary to the conventional understanding of hydrogen embrittlement. In this study, we investigated the underlying mechanism through in situ neutron diffraction experiments during tensile deformation using TAKUMI at the MLF of J-PARC. The results revealed that solid-solution strengthening by hydrogen plays the most significant role in improving the mechanical properties. Solute hydrogen atoms distort the lattice to suppress dislocation motion, thereby increasing the strength. The raised stress in the hydrogen charged sample enables the onset of deformation twinning at a smaller strain compared to the non-hydrogen charged sample. Consequently, the twinning-induced plasticity effect contributes more significantly to work hardening and the improvement of uniform elongation due to the solid-solution strengthening by hydrogen. These findings suggest a new pathway for the effective utilization of hydrogen in austenitic steels.

権利情報:

• In Copyright
  

キーワード: ステンレス鋼, 水素

刊行年月日: [2025年8月]

出版者: 日本中性子科学会

掲載誌:

• 波紋 (ISSN: 1349046X) vol. 35 issue. 3 p. 129-133

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://ndlsearch.ndl.go.jp/books/R100000002-I000004327911-i33660737

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更新時刻: 2025-11-13 16:30:10 +0900

MDRでの公開時刻: 2025-11-13 16:24:24 +0900