Stabilization of Stacking Faults and a Long Period Stacking Phase Dispersed in a-Mg Crystalline Grains of Mg-0.7 at%Zn-1.4at%Y Alloy

Jongbeom Lee, Kazuhisa Sato, Toyohiko J. Konno, Kenji Hiraga

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Mg-0.7 at%Zn-1.4 at%Y alloys annealed at low temperatures after quenching in water from 520°C were studied by high-resolution transmission electron microscopy (HRTEM) and high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Stacking faults, thin bands of a 14H-type long period stacking (LPS) phase and relatively thick bands of LPS were precipitated in α-Mg crystalline grains by annealing at 300°C, 400°C and 500°, respectively. The precipitation of stacking faults, LPS phase and a supersaturated solid solution without any precipitates were reversibly transformed by annealing at low temperatures. It can be concluded that the stacking faults and LPS phase are stabilized by the segregation ot Zn and Y from a supersaturated solid solution.

Original languageEnglish
Pages (from-to)222-225
Number of pages4
JournalMaterials Transactions
Volume50
Issue number1
DOIs
Publication statusPublished - 2009 Jan

Keywords

  • Long period stacking phase
  • Magnesium-zinc-yttrium alloy
  • Precipitate
  • Stacking fault
  • Supersaturated solid solution

ASJC Scopus subject areas

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

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