書誌事項
- タイトル別名
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- Tensile and Fatigue Properties of Austenitic Stainless Steels at LNG Temperature
- LNG オンドイキ ニ オケル オーステナイトケイ ステンレス コウ ノ ヒッ
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Tensile strength, fatigue strength and fatigue crack growth rate of metastable and stable austenitic stainless steels at the temperatures between 20°C and ·162°C have been studied. Microstructural changes of specimens during tensile and fatigue deformation were also observed. The results obtained are as follows.<BR>1) The proof stress of metastable steels slightly drops at low temperatures below about -100°C. This is due to the inducement of ε-martensite by tensile stress. Addition of nitrogen makes austenite matrix stable and rises proof stress.<BR>2) The fatigue strength increases with the increase in tensile strength which is raised by the inducement of α′-martensite in metastable steels and by the solid solution strengthening of matrix due to the addition of nitrogen in stable ones.<BR>3) Microstructural changes of tensile and fatigue deformation are characterized by α′-phase formation in metastable steel and by planar arrays of dislocation pile-ups in nitrogen added stable steel at-162°C.<BR>4) At-162°C, fatigue crack growth rate in high ΔK region is larger in metastable steels than in stable ones. This will be attributed to the formation of α′-phase at the tip of crack. In low ΔK region, stable steels exhibit large crack growth rate and this is due to a rapid propagation of fatigue crack along the slip line.
収録刊行物
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- 鉄と鋼
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鉄と鋼 65 (12), 1756-1765, 1979
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390282680130681856
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- NII論文ID
- 110001487879
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- NDL書誌ID
- 2066571
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- データソース種別
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- JaLC
- NDL
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- 使用不可