Creep Deformation Behavior and Microstructure of Laves-strengthened Ferritic Heat-resistant Steels Containing Nitrogen or Carbon
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- Yamasaki Shigeto
- Department of Materials, Kyushu University
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- Mitsuhara Masatoshi
- Department of Advanced Materials Science and Engineering, Kyushu University
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- Nakashima Hideharu
- Department of Advanced Materials Science and Engineering, Kyushu University
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- Kimura Kazuhiro
- Research Center for Structural Materials, National Institute for Materials Science
Bibliographic Information
- Other Title
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- 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
Description
<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>
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 109 (3), 167-178, 2023
The Iron and Steel Institute of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390576734221383936
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- ISSN
- 18832954
- 00211575
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- OpenAIRE
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- Abstract License Flag
- Disallowed