Dynamic correspondence principle in the viscoelasticity of metallic glasses

被引：9

作者：

Lyu, Guo-Jian ^{[1
,2
]}

Qiao, Ji-Chao ^{[1
,2
]}

Yao, Yao ^{[1
,3
]}

Pelletier, Jean-Marc ^{[2
]}

Rodney, David ^{[4
]}

Morthomas, Julien ^{[2
]}

Fusco, Claudio ^{[2
]}

机构：

[1] Northwestern Polytech Univ, Sch Mech, Civil Engn Architecture, Xian 710072, Shaanxi, Peoples R China

[2] Univ Lyon, MATEIS, INSA Lyon, UMR CNRS 5510, F-69621 Villeurbanne, France

[3] Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany

[4] Univ Lyon 1, Inst Lumiere Matiere, UMR5306, CNRS,Univ Lyon, F-69622 Villeurbanne, France

来源：

SCRIPTA MATERIALIA | 2020年 / 174卷

关键词：

Metallic glass; Dynamic mechanical relaxations; Molecular dynamics simulations; Dynamic correspondence principle; Viscoelasticity; Dynamic Poisson's ratio; POISSONS RATIO; MECHANICAL CHARACTERISTICS; BETA-RELAXATION;

D O I：

10.1016/j.scriptamat.2019.08.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：39 / 43

页数：5

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