Localized dislocation interactions within slip bands and crack initiation in Mg-10Gd-3Y-0.3Zr alloy

Chao He, Xue Li, Yongjie Liu, Chong Wang, Hong Zhang, Lang Li, Qingyuan Wang, Xiaohong Shao, Qiang Chen

Research output: Contribution to journalArticlepeer-review

Abstract

The underlying low-stress cyclic deformation and associated dislocation activities within the slip bands (SBs) in a rare earth-containing magnesium (RE-Mg) alloy were characterized. The results show that basal slip is the predominant deformation at grain scale, but the gliding of 〈c + a〉 dislocation is also visible near grain boundaries to accommodate localized inhomogeneous deformation. The interaction between basal 〈a〉 dislocations and non-basal 〈c + a〉 dislocations results in the nucleation of dislocation intensity zones (DIZs), which subsequently hinders the development of the basal slip bands. Therefore, it is suggested that the DIZs contributed to the enhanced high cycle fatigue resistance of RE-Mg alloys.

Original languageEnglish
Article number106302
JournalInternational Journal of Fatigue
Volume150
DOIs
Publication statusPublished - Sep 2021

All Science Journal Classification (ASJC) codes

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

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