Interaction between parallel shear bands in a metallic glass

KE Avila and S Kuchemann and HM Urbassek, JOURNAL OF NON-CRYSTALLINE SOLIDS, 566, 120882 (2021).

DOI: 10.1016/j.jnoncrysol.2021.120882

We present molecular dynamics simulations in a large CuZr metallic glass sample that allows the linking of the structural properties of a single shear band to the presence of other subsequently forming parallel shear bands. In a closely controlled study, we observe that the subsequent formation of parallel shear bands restores the disrupted icosahedral matrix in the core of previously formed shear bands, i.e., the shear- band core structure is partially relaxed to the original bulk level. The relaxation caused by the interaction between shear bands also manifests in a reduction of the potential energy and in an eventual return of previous plastic regions called shear transformation zones.

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