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Dynamic correspondence principle in the viscoelasticity of metallic glasses

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.
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Submitted on : Tuesday, September 3, 2019 - 1:51:31 PM
Last modification on : Wednesday, July 29, 2020 - 3:07:41 PM
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Guo-Jian Lyu, Ji-Chao Qiao, Yao Yao, Jean-Marc Pelletier, David Rodney, et al.. Dynamic correspondence principle in the viscoelasticity of metallic glasses. Scripta Materialia, Elsevier, 2020, 174, pp.39-43. ⟨10.1016/j.scriptamat.2019.08.015⟩. ⟨hal-02276268⟩



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