Residual stress relaxation and low- and high-cycle fatigue behavior of shot-peened medium-carbon steel

Jong Cheon Kim, Seong Kyun Cheong, Hiroshi Noguchi

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The objective of this study was to analyze the induced compressive residual stress (CRS) relaxation and redistribution during bending fatigue at low-cycle fatigue (LCF) and high-cycle fatigue (HCF) testing regimes of shot-peened 0.45% (annealed) carbon steel. First, the near-surface residual stress was measured by the X-ray diffraction method. After that, rotating bending fatigue tests were conducted to introduce the mechanical loadings, and quantitative measurements of the residual stress were made during the fatigue tests. The results showed that degradation of induced CRS under all loading conditions was found under the relaxation rates for residual stress depended on the applied strain. Moreover, it was found that the critical condition of the threshold-residual stress relaxation boundary that had a significant influence on the fatigue limit criterion for shot-peened medium-carbon steel. The empirical test results for the relaxation of induced CRS under the LCF and HCF regimes are discussed in detail and a new interpretation of the fatigue limit of shot-peened carbon steel is suggested based on the residual stress concept.

Original languageEnglish
Pages (from-to)114-122
Number of pages9
JournalInternational Journal of Fatigue
Volume56
DOIs
Publication statusPublished - Jan 1 2013

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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