Evolution of mechanical properties of cast Zr50Cu 40Al10 glassy alloys by structural relaxation

Yoshihiko Yokoyama, Yasutake Akeno, Toru Yamasaki, Peter K. Liaw, Raymond A. Buchanan, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

The volume of a quenched glassy alloy is a variable of cooling rates during the amorphization. Hence a change in the volume caused by the structural relaxation can be regarded as a degree of amorphousness. The density of Zr 50Cu40Al10 bulk glassy alloys (BGAs) increases linearly with the annealing temperature below the glass-transition temperature (Tg). With increasing the annealing temperature, the tensile strength and Vickers hardness show constant values, whereas the Young's moduli and Charpy impact values become larger and smaller, respectively. Especially, Charpy impact values of Zr-Cu-Al BGAs have a linear relationship with the relative value of excessive free volume, which correspond to the volume-change ratio caused by the full structural relaxation.

Original languageEnglish
Pages (from-to)2755-2761
Number of pages7
JournalMaterials Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • Bulk glassy alloy
  • Charpy impact test
  • Cold rolling
  • Shear band
  • Structural relaxation
  • Tensile strength
  • ZrCuAl

ASJC Scopus subject areas

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

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