窒素または炭素を含有するLaves強化型フェライト系耐熱鋼のクリープ変形挙動と微細組織

  • 山﨑 重人
    九州大学大学院工学研究院材料工学部門
  • 光原 昌寿
    九州大学大学院総合理工学研究院物質科学部門
  • 中島 英治
    九州大学大学院総合理工学研究院物質科学部門
  • 木村 一弘
    国立研究開発法人物質・材料研究機構構造材料研究拠点

書誌事項

タイトル別名
  • Creep Deformation Behavior and Microstructure of Laves-strengthened Ferritic Heat-resistant Steels Containing Nitrogen or Carbon

説明

<p>The creep deformation behavior and microstructure of a N-containing steel expected to exhibit high creep strength and excellent oxidation resistance were investigated. Even for steel with a high W content, it was possible to form a martensitic microstructure by adding a sufficient amount of N. Comparison of the microstructures of the N-containing steel and a C-containing steel confirmed that the two steels have the same crystal orientation relationship. The N-containing steel precipitated with the Laves phase as a strengthening phase displayed a higher creep strength than conventional steel under relatively high stress. However, the superiority of the creep strength of the N-containing steel relative to the conventional steel decreased under low stress. The stress exponent of the N-containing steel was different from those of the C-containing steel and the conventional steel. This deference considered to be ascribed to the difference of variation behavior of dislocation density during creep deformation.</p>

収録刊行物

  • 鉄と鋼

    鉄と鋼 109 (3), 167-178, 2023

    一般社団法人 日本鉄鋼協会

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参考文献 (22)*注記

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