Thermomechanical Dissipative behaviour of CuZr metallic glasses

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.

References in corpus (7)

• Amorphous Systems in Athermal, Quasistatic Shear
• Local elasticity map and plasticity in a model Lennard-Jones glass
• Continuum limit of amorphous elastic bodies: A finite-size study of low frequency harmonic vibrations
• Plastic Response of a 2D Lennard-Jones amorphous solid: Detailed analysis of the local rearrangements at very slow strain-rate
• On the Microscopic Foundations of Elasticity
• Particle displacements in the elastic deformation of amorphous materials: local fluctuations vs. non-affine field
• Propagative and diffusive regimes of acoustic damping in bulk amorphous material

Cited by in corpus (1)

• Composition effect in the thermo-mechanical behavior of glasses, and its modelization