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 language | English |
---|---|
Pages (from-to) | 39-43 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 174 |
DOIs | |
State | Published - 1 Jan 2020 |
Keywords
- Dynamic correspondence principle
- Dynamic mechanical relaxations
- Dynamic Poisson's ratio
- Metallic glass
- Molecular dynamics simulations
- Viscoelasticity