The effect of hard shot-peening on high cycle fatigue properties of SUS 316 L steel (evaluation of surface roughness effects using the annealing method)

Kiyotaka Masaki, Hironori Tohmyoh, Yasuo Ochi, Takashi Matsumura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Hard shot-peening (HSP) treatment was very successful for the improvement of the high cycle fatigue strength of SUS 316 L steel. However, the surface roughness by the HSP treatment was one of the dropping factors on the fatigue strength. In order to separate surface roughness effects from effects of compressive residual stress and strain hardening by the HSP treatment, the HSP-treated SUS 316 L was annealed in the vacuum to remove residual stress and recrystallization in hardened layer. The rotating bending fatigue tests for the annealed specimen were carried out under water cooling condition. The fatigue limit of annealed SUS 316 L was about 60 MPa lower than that of non-peened specimen which was about 200 MPa. To simulate the actual surface roughness, fatigue tests for the single notch specimens and small drilled holes specimens were carried out. As a result, the surface roughness effects by the HSP treatment were not consistent with the √area parameter model. The effects were explained by considering the stress concentration factor.

Original languageEnglish
Pages (from-to)334-339
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume65
Issue number630
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Hard shot-peening
  • High cycle fatigue
  • SUS 316 L
  • Stress concentration
  • Surface roughness

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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