|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Spatial Correlation of Elastic Heterogeneity Tunes the Deformation Behaviors of Metallic Glasses
||Neng Wang, Jun Ding, Lin Li
|On-Site Speaker (Planned)
The effect of spatial heterogeneity of elasticity, resulting from the inherently inhomogeneous amorphous structures, on the deformation behaviors of metallic glasses (MGs) is explored using multi-scale modeling methods. A highly heterogeneous shear modulus distribution at the nanoscale following a Gaussian-type is revealed by atomistic simulations in Cu64Zr36 MGs; in which the soft population exhibits great propensity to undergo inelastic shear transformation. The organization of such nanoscale shear transformation zones (STZ) into shear band patterns is further studied using a mesoscale STZ dynamics model. A critical spatial correlation length of elastic heterogeneity is identified for the simulated MGs to achieve the best tensile ductility. A transition of shear band formation mechanisms is observed in examination of the initial stage of shear banding process at various spatial correlation lengths. Discussion is focused on determining the correlation between shear bands and structural characteristics regulated by various spatial correlation of local shear moduli.
||Planned: Supplemental Proceedings volume