Regensburg 2019 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 36: Liquid and Amorphous Metals

MM 36.7: Vortrag

Donnerstag, 4. April 2019, 12:00–12:15, H46

Probing the degree of heterogeneity within the shear band of a model glass — •Alexandra E. Lagogianni, Muhammad Hassani, and Fathollah Varnik — ICAMS, Ruhr-Universitaet Bochum

We employ large scale molecular dynamic simulations to study the degree of heterogeneity within the shear band of a model sheared glass in the athermal limit. The heterogeneity, demonstrated as spatial variations of microscopic quantities such as density, local strain and viscosity, is tracked along the propagation direction of the shear band. The spatial evolution of these quantities inside the shear band shows a position-dependent nature and a sinusoidal-like pattern with a large characteristic length scale. By probing the correlations of the quantities at the stationary plastic region, we provide a quantitative analysis of the underlying mechanism and the local environment of the shear band. These correlations, captured by a simple glass forming model, are suggested to be a generic feature of metallic glasses rather than material-specific properties.