|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Thermally Activated Plastic Events and Their Underlying Structural Signature in Metallic Glasses
||Jun Ding, Evan Ma, Mark Asta, Robert Ritchie
|On-Site Speaker (Planned)
Thermally activated plastic events, known as β-relaxation processes, are investigated in metallic glasses from the perspective of the potential energy landscape (PEL) using molecular dynamics simulations and the activation-relaxation technique nouveau (ARTn). Activated plastic events are observed as elementary hopping processes between the sub-basins confined within a meta-basin in the PEL. For a variety of metallic glasses the distribution of activation energy for thermally activated plastic events are revealed, along with how these activation energies (of sub-basin in PEL) relate with shear modulus (reflecting the curvature of meta-basin in the PEL). Furthermore, the underlying structural signature of energy barriers for the activated plastic events are characterized from the aspect of the local atomic packing structure across several different metallic glasses. The present findings shed light on the nature of β processes in metallic glasses, with emphasis on their structure-property relationship.
||Planned: A print-only volume