Observation of hydrogen effects on fatigue crack growth behaviour in an 18Cr-8Ni austenitic stainless steel

Y. Oda, H. Noguchi

研究成果: Contribution to journalArticle査読

46 被引用数 (Scopus)

抄録

The hydrogen effect on crack growth behaviour in a type 304 austenitic stainless steel was investigated and the following results were obtained. The crack growth rate in hydrogen gas is accelerated compared with that in air. In order to clarify the mechanism of the acceleration, the growth behaviours of a crack propagating in a grain and propagating along the boundary to be a fracture facet were investigated. Slip behaviour, opening displacement and fractography showed that the slip-off mechanism in fatigue crack growth is valid even in hydrogen gas. Hydrogen mainly affects slip behaviour such that slip bands concentrate at a crack tip and result in acceleration of the growth rate. The facets are not significantly responsible for the acceleration. The ratio of facets to the entire area is low, and a crack nearly compensates for the temporary acceleration by the facets with subsequent deceleration.

本文言語英語
ページ(範囲)99-113
ページ数15
ジャーナルInternational Journal of Fracture
132
2
DOI
出版ステータス出版済み - 3 2005

All Science Journal Classification (ASJC) codes

  • 計算力学
  • モデリングとシミュレーション
  • 材料力学

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