Restoration of fatigue damage in stainless steel by high-density electric current

Yongpeng Tang, Atsushi Hosoi, Yasuyuki Morita, Yang Ju

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

To investigate the effect of high-density electric current on healing of the fatigue damage, the recovery of residual plastic strain was quantitatively evaluated with the digital image correlation method. The microhardness was measured within the plastic zone at the root of notch. Furthermore, the dislocation structures before and after the application of electric current were investigated by transmission electron microscopy to further understand the mechanics of the healing effect. It was concluded that the fatigue damage was healed by a decrease in dislocation density. As a result, fatigue crack initiation was delayed by the healing of fatigue damage.

Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalInternational Journal of Fatigue
Volume56
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes

Keywords

  • Dislocation
  • Electric current
  • Fatigue crack initiation
  • Microhardness
  • Plastic strain

ASJC Scopus subject areas

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

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