Low-temperature mechanical properties of Ce68Al10Cu20Co2bulk metallic glass

P. Yu, Kang Cheung Chan, W. Chen, L. Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

Although it is well known that traditional metals and alloys will become brittle at low temperatures, the effect of low temperature on the mechanical properties of bulk metallic glasses (BMGs) is yet to be fully understood. In this research, the mechanical properties of Ce68Al10Cu20Co2BMG are investigated at low temperatures. It is found that the yield strength of the Ce-based BMG increases significantly with the decrease of temperature. The elastic moduli of the BMG also increase monotonically with the drop of temperature, indicating the continuous stiffening of the BMG, while both Poisson's ratio and global plasticity decline at low temperatures. It is considered that the stiffer atomic bonds of the Ce-based BMG at low temperatures result in the increase of strength, and the higher energy required for nucleation of shear bands also leads to the increase in yield strength.
Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalPhilosophical Magazine Letters
Volume91
Issue number1
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • bulk metallic glass
  • fracture strength
  • low temperature
  • mechanical properties

ASJC Scopus subject areas

  • Condensed Matter Physics

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