Dynamic electropulsing induced phase transformations in a furnace cooled Zn-Al based alloy (ZA22)

Suet To, Y. H. Zhu, Wing Bun Lee, X. M. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Multi-phase identification and phase transformations in a dynamic electropulsing treated Zn-Al based alloy (ZA22) were studied by using backscattered scanning electron microscopy (BSEM) and electron back-scattered diffraction techniques (EBSD). By using EBSD, two hep phases η′s and η′T with a small difference of about 1% in lattice parameters (c/a) were discriminated. Two stages of phase transformations: (a) η′s → η′T + ε′T + α′T and ε + α→T′ + η (in a way of quenching), and (b) T′ + η → ε + α and η′T + ε′T + α′T η′s (in a way of upquenching), were detected. It was found that dynamic electropulsing was less effective in accelerating phase transformations than static electropusling. The mechanism of dynamic electropulsing induced phase transformations is discussed from the point view of Gibbs free energy and electropulsing kinetics.
Original languageEnglish
Pages (from-to)1997-2004
Number of pages8
JournalMaterials Transactions
Volume51
Issue number11
DOIs
Publication statusPublished - 1 Nov 2010

Keywords

  • Electron back-scattered diffraction (EBSD)
  • Electropulsing
  • Phase transformations
  • Tensile deformation
  • Zinc-aluminum alloy

ASJC Scopus subject areas

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

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