Deformation behavior of Zr-based bulk metallic glass and composite in the supercooled liquid region

Qi Chen, Lin Liu, Kang Cheung Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

A Zr-based bulk metallic glass (BMG) with a composition of (Zr75Cu25)78.5Ta4Ni10Al7.5and a bulk metallic glass matrix composite (BMGC) with a composition of (Zr75Cu25)74.5Ta8Ni10Al7.5have been prepared by copper-mold casting. The compressive deformation behavior of the BMG and BMGC was investigated in the supercooled region at different temperatures and various strain rates ranging from 8×10-4s-1to 8×10-2s-1. It was found that both the strain rate and test temperature significantly affect the deformation behavior of the two alloys. The deformation follows Newtonian flow at low strain rates but non-Newtonian flow at high strain rates. The deformation mechanism for the two kinds of alloys was discussed in terms of the transition state theory.
Original languageEnglish
Pages (from-to)349-355
Number of pages7
JournalScience in China, Series G: Physics, Mechanics and Astronomy
Volume51
Issue number4
DOIs
Publication statusPublished - 1 Apr 2008

Keywords

  • Bulk metallic glass
  • Composites
  • Compressive deformation
  • Free volume
  • Supercooled liquid region

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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