Plastic Deformation and Failure Mechanisms in Notched Nano-Scale Metallic Glass Specimens

Abstract

Finite element analysis (FEA) of tensile loading of nano-scale double edge notched (DEN) metallic glass (MG) specimens are conducted using a non-local plasticity model. The effects of notch acuity on the plastic deformation response of the samples are studied. Transition is observed from localized plastic deformation by single shear band (SSB) to necking of the ligament and further to double shear bands (DSBs) with increase in notch acuity. These results corroborate with molecular dynamics (MD) simulations and are rationalized from spread of plastic zone in the ligament.