An eigenstrain-based finite element model and the evolution of shot peening residual stresses during fatigue of GW103 magnesium alloy

X. Song, W. C. Liu, J. P. Belnoue, J. Dong, G. H. Wu, W. J. Ding, S. A.J. Kimber, T. Buslaps, A. J.G. Lunt, A. M. Korsunsky

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Magnesium alloy GW103 samples were heat treated to different ageing conditions and then shot peened using process parameters that deliver optimized high cycle fatigue (HCF) life. Significant HCF life improvements were observed in all samples, with a peak-aged sample showing the biggest increase. In order to simulate the effect and evolution of residual stresses during low cycle fatigue (LCF), a Finite Element (FE) model was employed, taking into account both the shot-peening-induced plastic strains and the influence of hardening on subsequent deformation. Experimental and modelling results offer a basis for explaining the observed fatigue performance improvement due to shot peening.

Original languageEnglish
Pages (from-to)284-295
Number of pages12
JournalInternational Journal of Fatigue
Volume42
DOIs
Publication statusPublished - 1 Sep 2012

Keywords

  • Ageing
  • Eigenstrain
  • Magnesium alloy
  • Residual stress
  • Shot peening

ASJC Scopus subject areas

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

Cite this