Approximate residual stress and plastic strain profiles for laser-peened alloy 600 surfaces

Eui Kyun Park, Hyun Jae Lee, Ju Hee Kim, Yun Jae Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper presents approximate in-depth residual stress and plastic strain profiles for laser-peened alloy 600 surface via FE analysis. In approximations, effects of the initial welding residual stress and the number of shots are quantified. Based on FE analysis results, residual stress profiles are quantified by two variables; the maximum difference in stress before and after LSP, and the depth up to which the compressive residual stress exists. Plastic strain profiles are quantified by one variable, the maximum equivalent plastic strain at the surface. The proposed profiles are validated by comparing with published LSP experimental results for welded plates. Effects of the initial welding residual stress and the number of shots on these variables are discussed. The proposed profile can be directly applied to predict the mitigation effect of LSP on PWSCC and to efficiently perform structural integrity assessment of laser peened nuclear components.

Original languageEnglish
Pages (from-to)1250-1264
Number of pages15
JournalNuclear Engineering and Technology
Volume55
Issue number4
DOIs
Publication statusPublished - 2023 Apr

Bibliographical note

Publisher Copyright:
© 2022 Korean Nuclear Society

Keywords

  • Alloy 600
  • Approximate solutions
  • FE laser shock peening simulation
  • Residual stress and plastic strain

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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