|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||The Effect of Cooling Rate on the Local Elastic Fluctuations in Metallic Glass Alloys
||Peter Tsai, Kelly Kranjc, Katharine Flores
|On-Site Speaker (Planned)
It has been proposed that the ductility of monolithic metallic glasses is directly correlated with the presence of structural heterogeneities arising from local variations in the efficiency of atomic packing. Similarly, the extent of plastic deformation in metallic glasses has been shown to exhibit a significant dependence on their thermal processing history due to the loss of free volume with annealing. While molecular dynamics studies enable direct observation and analysis of atomic-scale heterogeneities, the extreme quench rates involved in creating the simulated models may produce structures much finer than real glasses vitrified under much slower cooling conditions. In this work, we used nanoscale modulus mapping to study the spatial evolution of elastic heterogeneities within a Zr-based glass that was synthesized under a wide range of cooling conditions. A coarsening of the elastic fluctuations was observed that may contribute to a more complete understanding of structure-property relationships in metallic glass alloys.
||Planned: A print-only volume