|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Deformation Mechanism of Nanostructure Metallic Glass
||Sara Adibi, Paulo Branicio, Shailendra Joshi
|On-Site Speaker (Planned)
In order to improve the plasticity a new type of metallic glass (MG) architecture referred to as nanoglass (NG) has been recently proposed. NGs microstructure comprises bulk glassy regions connected by grain boundary like interfacial regions. In this work, we use large-scale molecular dynamics simulations to investigate the mechanical behavior of NG nanopillars over a range of particle sizes. Results reveal NG ductility and failure by necking, in contrast to brittle failure by shear band propagation in MG nanopillars. This occurs because the interfacial regions act as preferred channels for plasticity, causing the generation of an interconnected motif of shear bands that depends on the microstructure particle size, structure, and connectivity. In comparison, the MG nanopillars fail catastrophically through localization due to the formation of a single dominant shear band. These results highlight the intriguing effects of NG architectures in amorphous metallic alloys.
||Planned: Supplemental Proceedings volume