Extended elastic model for flow in metallic glasses

TL;DR

This paper introduces an extended elastic model that highlights the importance of both shear and bulk moduli in understanding flow and deformation in metallic glasses, linking flow activation energy to elastic properties.

Contribution

It proposes a new elastic model incorporating both shear and bulk moduli to better explain flow behavior in metallic glasses.

Findings

Flow activation energy density correlates with elastic moduli.

Both shear and bulk moduli are critical for flow in metallic glasses.

The model aids understanding of glass transition and deformation mechanisms.

Abstract

We report that both shear and bulk moduli, not only shear modulus, are critical parameters involved in both homogeneous and inhomogeneous flows in metallic glass. The flow activation energy (\Delta F) of various glasses when scaled with average molar volume Vm, which is defined as flow activation energy density \rho_E =\Delta F/Vm, can be expressed as: D=(10G+K)/11 . The extended elastic model is suggestive for understanding the glass transition and deformation in metallic glasses.