Deformation behavior of bulk and nanostructured metallic glasses studied via molecular dynamics simulations

Abstract

In this study, we characterize the mechanical properties of Cu${}_{64}$Zr${}_{36}$ nanoglasses under tensile load by means of large-scale molecular dynamics simulations and compare the deformation behavior to the case of a homogeneous bulk glass. The simulations reveal that interfaces act as precursors for the formation of multiple shear bands. In contrast, a bulk metallic glass under uniaxial tension shows inhomogeneous plastic flow confined in one dominant shear band. The results suggest that controlling the microstructure of a nanoglass can pave the way for tuning the mechanical properties of glassy materials.