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arXiv · 2401.05117

Thermomechanical Dissipative behaviour of CuZr metallic glasses

Matias Sepulveda-Macias·Gergely Molnár·Anne Tanguy
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Abstract

We performed molecular dynamics simulations of Zr$_{50}$Cu$_{50}$ 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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Matias Sepulveda-Macias, Gergely Molnár, Anne Tanguy. 2024-01-10. Thermomechanical Dissipative behaviour of CuZr metallic glasses. https://doi.org/10.1016/j.jnoncrysol.2024.123028

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