|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Modeling the Mechanics Responsible for Strain Delocalization in Metallic Glass Matrix Composites
||Casey Messick, Eric R Homer
|On-Site Speaker (Planned)
Metallic glass matrix composites (MGMCs) generally demonstrate improved ductility over their purely amorphous counterparts. This has been successfully accomplished in one case by matching microstructural length scales to shear band sizes. It is hypothesized that the crystalline inclusions cause a retardation of shear band propagation rates and an increase of shear band nucleation events ultimately resulting in strain delocalization throughout the specimen. Efforts to examine this hypothesis using the mesoscale STZ dynamics model will be presented. The examination will focus on the effects of changing strain rates and microstructural factors on the macroscopic response of the system. In particular, shear band propagation rates, nucleation rates, and sliding velocities will be analyzed to verify the hypothesis. Collaborative modeling and experimental efforts to measure elastic and plastic properties of individual phases will also be presented.
||Planned: Supplemental Proceedings volume