Dynamic correspondence principle in the viscoelasticity of metallic glasses

Guo Jian Lyu, Ji Chao Qiao, Yao Yao, Jean Marc Pelletier, David Rodney, Julien Morthomas, Claudio Fusco

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We simulate dynamical mechanical spectroscopy in a Cu64Zr36 bulk metallic glass using non-equilibrium molecular dynamics. Applying several loading conditions (constant volume, longitudinal, uniaxial and isostatic), we find that different elastic moduli have very contrasted dynamical properties but satisfy the dynamic correspondence principle, which states that the relations between static moduli can be extended to dynamical moduli, both below and above the glass transition temperature. In particular, we determine the debated dynamic Poisson's ratio from three different but consistent expressions. Finally, we trace the origin of dissipation down to regions of low stability devoid of icosahedral clusters.

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalScripta Materialia
Volume174
DOIs
StatePublished - 1 Jan 2020

Keywords

  • Dynamic correspondence principle
  • Dynamic mechanical relaxations
  • Dynamic Poisson's ratio
  • Metallic glass
  • Molecular dynamics simulations
  • Viscoelasticity

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