書誌事項
- タイトル別名
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- Influence of Stress Re-distribution on Hydrogen-induced Fatigue Crack Propagation
- オウリョク サイブンパイ コウカ ガ スイソ ジョチョウ ヒロウ キレツ シンテン ニ オヨボス エイキョウ
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<p>In order to clarify influence of stress re-distribution effect on hydrogen-induced fatigue crack propagation, we investigated fatigue crack propagation rates and brittle-like fracture ratio. The experiments were conducted in nitrogen and hydrogen gas atmosphere with ferrite-pearlite steels having different pearlite ratio, respectively. The crack propagation rates and the brittle-like fracture ratio decreased as pearlite ratio increased. To explain the changes of crack propagation rates and fracture ratio, we proposed that the stress re-distribution effect causing stress and strain relaxation at a crack tip contributes to suppression of the hydrogen-induced fatigue crack propagation. As a verification, finite element methods were operated with models having different width of the hard phase and different distance between a crack tip and a hard phase in plane stress and strain conditions, respectively. The finite element method analysis showed that stress re-distribution effect was smaller in plane strain condition than that in plane stress condition, indicating that a large hardness difference is crucial in plane stress condition to suppress the hydrogen-induced fatigue crack propagation.</p>
収録刊行物
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- 鉄と鋼
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鉄と鋼 104 (1), 46-53, 2018
一般社団法人 日本鉄鋼協会
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キーワード
詳細情報
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- CRID
- 1390001205215036416
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- NII論文ID
- 130006300456
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- NDL書誌ID
- 028775247
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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
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可