Thermomechanical Dissipative behaviour of CuZr metallic glasses

2024/01/10 by Matías Sepúlveda-Macías, Sepulveda-Macias, Matias, Gergely Molnár +3
Engineering · Materials Science · #FOS: Physical sciences #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Metallic Glasses and Amorphous Alloys

paper · pdf · doi:10.48550/arxiv.2401.05117

openalex publication_date 2024/01/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We performed molecular dynamics simulations of Zr₅₀Cu₅₀ metallic glass samples submitted to mechanical deformation at different strain rates. The simultaneous measurements of the stress-strain curve, and of the temperature evolution during the cyclic mechanical load, are used to determine the thermo-mechanical constitutive laws at the continuum scale. It is shown that plastic deformation acts as a heat source, but strong finite size effects affect the unfolding of shear bands and its related dissipation rate. Finally, a thermo-mechanical constitutive law is proposed to reproduce quantitavely self-heating processes at different scales.

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