Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading

Fan Zhang, Yu Ren, Shoucong Ning, Yuan Tian, Weiwei Hu, Chengwen Tan, Takeshi Fujita, Akihiko Hirata, Mingwei Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The deformation microstructure of an interdendritic18 R long-period stacking ordered (LPSO) phase in an Mg-Zn-Y alloy subjected to shock loading was investigated by transmission electron microscopy. It was found that kink banding, the key deformation mode of LPSO phases under quasi-static loading, is suppressed by shock loading. Instead, second-order pyramidal slip by <c+a> dislocations, which has not been observed in LPSO before, contributes to the plastic deformation of LPSO, in addition to the <a> dislocations. The rate-dependent deformation modes of LPSO have an important implication in understanding the mechanical behaviour of LPSO strengthened Mg alloys under extreme loading conditions.

Original languageEnglish
Pages (from-to)21-25
Number of pages5
JournalIntermetallics
Volume102
DOIs
Publication statusPublished - 2018 Nov

Keywords

  • Dislocation
  • Electron microscopy
  • Intermetallics
  • Microstructure
  • Plastic deformation mechanisms

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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