Thermally stable quasicrystalline phase in a superplastic Mg-Zn-Y-Zr alloy

D. H. Bae, Y. Kim, I. J. Kim

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Abstract

A Mg-rich Mg-Zn-Y-Zr alloy sheet, which contains two different particles, icosahedral quasicrystalline phase (I-phase) and Zr-rich phase in the fine-grained α-Mg matrix, has been developed by thermomechanical processes. With an addition of zirconium in the ternary Mg-Zn-Y alloy, the I-phase/α-Mg eutectic temperature increases to 500 °C and the lattice constant of the I-phase slightly increases, leading to a more thermally stable eutectic structure. The fine-grained Mg-Zn-Y-Zr alloy shows large elongations to failure at the temperature above 400 °C, and no cavity is formed at the interface between the α-Mg and the I-phase during superplastic deformation.

Original languageEnglish
Pages (from-to)2190-2193
Number of pages4
JournalMaterials Letters
Volume60
Issue number17-18
DOIs
Publication statusPublished - 2006 Aug 1

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All Science Journal Classification (ASJC) codes

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

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