Effect of high-density electric current on the microstructure and fatigue crack initiation of stainless steel

Yongpeng Tang, Atsushi Hosoi, Yuichi Iwase, Yang Ju

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

To investigate the effect of high-density electric current on the delay of fatigue crack initiation, the dislocation structures before and after the application of electric current were investigated by transmission electron microscopy. Dislocation density was quantitatively characterized before and after the application of electric current to further understand the mechanics of the healing effect. Atomic force microscope results showed that the slips disappeared locally and the slip height decreased on the surface of the specimens. Furthermore, the delaying effect of the crack initiation due to the application of electric current was evaluated by the fatigue crack-initiation model in which the accumulation of the dislocation density was considered.

Original languageEnglish
Pages (from-to)2085-2092
Number of pages8
JournalMaterials Transactions
Volume54
Issue number11
DOIs
Publication statusPublished - 2013 Nov 18
Externally publishedYes

Keywords

  • Crack initiation
  • Dislocation
  • Electric current
  • Fatigue
  • Slip bands

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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