Elastic and viscoelastic properties of glassy, quasicrystalline and crystalline phases in Zr65Cu5Ni10Al 7.5Pd12.5 alloys

Jean Marc Pelletier, Dmitri V. Louzguine-Luzgin, Song Li, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The elastic and viscoelastic properties of Zr65Ni 10Cu5Al7.5Pd12.5 bulk metallic glass have been studied over a wide temperature and frequency range. In the amorphous state the mechanical response of the alloy is simple, similar to that observed in other bulk metallic glasses. In contrast, the phase-transformation process which occurs during annealing at elevated temperature induces a complex evolution. This alloy transforms to a supercooled liquid and then primarily forms an icosahedral phase followed by the formation of a mixture of crystalline phases. The mechanical properties in the amorphous state are well described using a physical model based on the concept of defects in amorphous materials. Atomic mobility is then governed by two parameters: activation energy U el (0.92 eV) and correlation factor χ (0.39). The influence of the phase composition on the properties is discussed.

Original languageEnglish
Pages (from-to)2797-2806
Number of pages10
JournalActa Materialia
Volume59
Issue number7
DOIs
Publication statusPublished - 2011 Apr

Keywords

  • Bulk metallic glasses
  • Dynamic mechanical analysis
  • Elastic behaviour
  • Phase transformations
  • Viscoelastic behaviour

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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