Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy

Xin Fu Gu, Tadashi Furuhara, Takanori Kiguchi, Toyohiko J. Konno, Leng Chen, Ping Yang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Cooperative growth of the structure units (SUs) in a 14H type long-period stacking ordered (LPSO) structure has been observed, and there is no obvious accumulation of transformation strain at the growth fronts. The atomic structures at this front are further characterized by Cs-corrected scanning transmission electron microscopy, and the partial dislocations associated SUs are uniquely defined based on the observations at different zone axes. It is found that the Burgers vectors of neighbouring partials are alternatively opposed so that the transformation strain is self-accommodated. Furthermore, this self-accommodation mechanism is rationalized by the elastic interaction energy for combinations of different partials.

Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalScripta Materialia
Volume185
DOIs
Publication statusPublished - 2020 Aug

Keywords

  • Dislocation structure
  • Magnesium alloy
  • Modeling
  • Scanning Transmission Electron Microscopy (STEM)
  • Strain accommodation

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Strain self-accommodation during growth of 14H type long-period stacking ordered (LPSO) structures in Mg-Zn-Gd alloy'. Together they form a unique fingerprint.

Cite this