Fatigue Fracture Surface of Ultra-Fine Grained Ferritic Stainless Steels
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- MATSUMURA Yoshikazu
- Japan Ultra-high Temperature Materials Res. Inst.
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- KISHI Katsuhiro
- Japan Ultra-high Temperature Materials Res. Inst.
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- ISHIBASHI Yasuhiro
- MHI Solution Tecn.
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- EBARA Ryuichiro
- Dept. of Mech. System Eng., Hiroshima Inst. of Tech.
Bibliographic Information
- Other Title
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- 超細粒フェライト系ステンレス鋼の疲労破面
- 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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Description
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.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 57 (2), 134-139, 2008
The Society of Materials Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680395384576
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- NII Article ID
- 130002085737
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 9394124
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
