The effect of microalloying on mechanical properties in CuZrAl bulk metallic glass

J. Pan, Kang Cheung Chan, Q. Chen, N. Li, S. F. Guo, L. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)

Abstract

The effect of the minor addition of elements Ta and Fe on the mechanical properties of the CuZrAl BMG was investigated by compression tests. It was found that the addition improves significantly the plasticity at room temperature. The compressive plastic strain enhanced from 0.59% for Cu46Zr47Al7BMG to 2.62% and 4.81% for Cu46Zr45Al7Ta2and Cu44Zr47Al7Fe2BMG, respectively. The microstructure of Cu44Zr47Al7Fe2BMG was further investigated by TEM, which reveals the occurrence of phase separation with the formation of a Cu-rich phase and a Fe-rich phase due to the minor addition of Fe. The formation of inhomogeneous structure in amorphous phase, which results in the activation of multi shear bands, can account for the improvement of the plasticity of the base BMG. The present results provide a promising approach to enhance the plasticity of BMGs through compositional and structural design by microalloying.
Original languageEnglish
JournalJournal of Alloys and Compounds
Volume504
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 1 Aug 2010

Keywords

  • Bulk metallic glass
  • Microalloying
  • Phase separation
  • Plasticity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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