Evaluation of yield stress distribution in the surface layer and fatigue properties of the stainless steel modified by cavitation peening

Masaaki Nishikawa, Osamu Takakuwa, Hitoshi Soyama

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

The present study evaluated the yield stress distribution in the surface layer and the fatigue properties of a steel SUS316L modified by cavitation peening (CP). The yield stress was evaluated based on micro-indentation tests using a spherical indenter. Especially, a technique of inverse analysis using elastic-plastic finite element analyses was utilized to determine the yield stress from the results of indentation tests, at which the effect of compressive residual stress introduced by CP was excluded. The identified results revealed that the surface with 50 μm in thickness was remarkably work-hardened by CP, and that the yield stress was increased within 500 urn in depth from the surface. Moreover, the plane bending fatigue tests demonstrated that the fatigue limit of the specimen was increased from 277 MPa to 362 MPa by C.P. Therefore, we can conclude that CP is effective for introducing a high yield stress on the metal surface, which suppresses the initiation of surface crack during fatigue cycles.

本文言語英語
ページ(範囲)1367-1372
ページ数6
ジャーナルNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
76
770
DOI
出版ステータス出版済み - 10月 2010
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 材料力学
  • 機械工学

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