Effects of hydrogen environment on fatigue characteristics in a type 304 austenitic stainless steel

Kyohei Kawamoto, Yuta Aoki, Yasuji Oda, Hiroshi Noguchi, Kenji Higashida

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

In order to clarify the effects of hydrogen on the fatigue characteristics of an austenitic stainless steel, bending fatigue tests on plain specimens were conducted in air and in a hydrogen gas. Main results obtained are as follows. Effects of hydrogen are not clearly seen on the fatigue strain-life diagram, because the hydrongen gas environment has opposite effects to crack propagation and to crack initiation; accelerates crack propagation, but retards crack initiation. Striation spacing or in-situ observations confirm the acceleration. The cause of retardation seems to be the lack of oxygen or water vapor in the hydrogen. Several cracks propagate in air, but only one crack occurred in hydrogen. The difference in the number of cracks is supposed to depend on the ratio of the crack initiation life to fatigue life.

本文言語英語
ページ(範囲)443-450
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
71
3
DOI
出版ステータス出版済み - 3 2005

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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