|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Theoretical Analysis of Shear-band Arrangements in Notched Bulk Metallic Glasses
||Weidong Li, Yanfei Gao, Hongbin Bei
|On-Site Speaker (Planned)
Inducing profuse shear bands via geometric constraints is regarded as an effective external means to enhance the ductility of bulk metallic glasses (BMGs), by distributing overall plastic strain over more shear bands and thus elongating the lifetime of each individual one. Experimental work on the ductility amelioration in notched metallic glasses have been extensively studied, but a persuasive mechanistic explanation is still lacking, particularly in terms of stress field – shear band interaction. With aid of the instability theory that forecasts the onset of strain localization and the free-volume based finite element simulations that predict the evolution of shear bands, the work reveals shear band arrangements in double edge notched BMGs under various conditions, i.e., varied notch dimensions and mode mixities. Mechanistic pictures in the correlation of shear band patterns with the stress state are painted for justifying a number of relevant experimental observations.
||Planned: Supplemental Proceedings volume