Numerical Study of Laser Shock Peening Effects on Alloy 600 Nozzles with Initial Residual Stresses

Ji Soo Kim, Hyun Suk Nam, Yun-Jae Kim, Ju Hee Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper investigates the effect of initial residual stress and prestrain on residual stresses due to laser shock peening for Alloy 600 using numerical simulation. For simulation, the strain rate dependent Johnson-Cook hardening model with a Mie-Grüneisen equation of state is used. Simulation results are compared with published experimental data, showing good agreement. It is found that the laser shock peening (LSP) process is more effective for higher initial tensile residual stress and for larger initial prestrain in terms of compressive stress at the near surface. However, the effective depth decreases with increasing initial tensile residual stress and initial prestrain.

Original languageEnglish
Article number041406
JournalJournal of Pressure Vessel Technology, Transactions of the ASME
Volume139
Issue number4
DOIs
Publication statusPublished - 2017 Aug 1

Keywords

  • Alloy 600 penetration nozzle
  • Laser shock peening
  • primary water stress corrosion cracking (PWSCC) mitigation
  • welding residual stress

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials
  • Mechanical Engineering

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