1109 微視疲労き裂の挙動に注目した析出強化型ステンレス鋼A286の疲労強度特性(OS11-2 材料の疲労挙動と損傷評価-き裂発生・進展-)

Translated title of the contribution: 1109 Fatigue strength properties of precipitation strengthening stainless steel A286 focused attention on small fatigue crack behaviour

呉 昊, 忍田 雄樹, 濱田 繁, 野口 博司

Research output: Contribution to journalArticle

Abstract

In order to claiify the fundamental fatigue strength characteristic of precipitation strengthening type stainless steel: A286, fatigue tests were performed. In the fatigue test, the authors paid attention to the behavior of small fatigue cracks in order to make clear fatigue strength properties more than usual fatigue test. As a result of the fatigue test, the fatigue strength characteristic of A286 became clear as shown below. The crack of a size according to a ciystal grain diameter initiates. The cracks are easy to initiate and propagate by Mode II. The fatigue crack does not become a non-propagating crack. Many cracks initiate and propagate even if the stress is around the fatigue limit. The cracks join together and it becomes a long crack, and fmally results in a failure. This is the reason why the fatigue failures occur even after 10^7 cycles.
Translated title of the contribution1109 Fatigue strength properties of precipitation strengthening stainless steel A286 focused attention on small fatigue crack behaviour
Original languageJapanese
Pages (from-to)1007-1009
Number of pages3
JournalM&M材料力学カンファレンス
Volume2010
Issue number0
DOIs
Publication statusPublished - 2010

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