Cycle Deformation Enabled Controllable Mechanical Polarity of Bulk Metallic Glasses

Tuning anisotropy in bulk metallic glasses, ideally isotropic, is of practical interest optimizing properties and fundamental understanding the amorphous structure its instability. By employing quasi-elastic asymmetric mechanical cycling method, we effectively induce polarity a model glass, without damaging sample or introducing significant annealing rejuvenation effects. Moreover, polarized anelastic limit can be well controlled by regulating amplitude cycling. Through atomic-level analysis nonaffine displacement, find that only plastic atomic rearranged events corresponding to training direction exhausted survived dominate directional limit. The distribution local yield stress reveals attributed plastic-event-healing induced asymmetry potential energy surface, rather than frozen-in strain. Furthermore, healing associated with redistribution residual indicates origin Our study importance, which furthers our deformation glasses shed some light on prospects for improved through anisotropy.