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

研究成果: Contribution to journalArticle査読

抄録

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.

本文言語英語
論文番号106302
ジャーナルInternational Journal of Fatigue
150
DOI
出版ステータス出版済み - 9 2021

All Science Journal Classification (ASJC) codes

  • モデリングとシミュレーション
  • 材料科学(全般)
  • 材料力学
  • 機械工学
  • 産業および生産工学

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