書誌事項
- タイトル別名
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- Fatigue Fracture Surface of Ultra-Fine Grained Ferritic Stainless Steels
- チョウサイリュウ フェライトケイ ステンレスコウ ノ ヒロウ ハメン
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抄録
Ferritic stainless steels such as Fe-2.25Cr-1Mo-1Zr, Fe-25Cr-1Zr and Fe-13Cr-8Ni-2Mo-1Zr with ultra-fine grain size of 0.2μm were prepared by hot extrusion after mechanical alloying. Axial fatigue life tests for plane round bar specimens of these steels were conducted at 473K. The higher fatigue strengths of these steels at 473K were observed as compared with those of conventional steels such as SAE8740 and SNB16. Fatigue strength expressed as maximum stress at 3 × 106 cycles for Fe-2.25Cr-1Mo-1Zr, Fe-13Cr-8Ni-2Mo-1Zr and Fe-25Cr-1Zr were 1150, 1150 and 1350MPa, respectively. Transranular fracture surfaces were predominantly observed at crack initiation and propagation area. Striation was observed at defined region of crack propagation area. It can be concluded that the higher fatigue strength of ferritic stainless steels with ultra-fine grain size of 0.2μm is strongly governed by delay of crack initiation.
収録刊行物
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- 材料
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材料 57 (2), 134-139, 2008
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390282680395384576
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- NII論文ID
- 130002085737
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 9394124
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可