Effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass

Y. H. Li, W. Zhang, C. Dong, A. Kawashima, A. Makino, P. K. Liaw

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass (BMG) with high glass-forming ability were investigated. With lowering the temperature from 293K to 77K, the compressive yield stress of the BMG increases from 1791MPa to 2217MPa, and the compressive plastic strain enhances from 3.5% to 16.7%. Similarly, the BMG exhibits an enhanced tensile fracture stress of 2036MPa and a distinct tensile plastic strain of 0.14% at 77K, compared to those of 1743MPa and 0 at 293K, respectively. In addition, the elastic moduli and Debye temperature of the BMG increase monotonously with decreasing temperature. The mechanisms of enhanced strength and plasticity of BMGs at cryogenic temperatures are discussed in terms of the inter-atomic bonding and the mobility and coalescence of free volumes.

Original languageEnglish
Pages (from-to)7-13
Number of pages7
JournalMaterials Science and Engineering A
Volume584
DOIs
Publication statusPublished - 2013 Nov 1

Keywords

  • Bulk metallic glasses
  • Cryogenic temperatures
  • Mechanical properties
  • Plasticity
  • Shear bands

ASJC Scopus subject areas

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

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