|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Atomic-scale plastic flow of platinum-based metallic glasses prepared with different fictive temperatures
||Xinzhe Wang, Amit Datye, Shuhan Zhang, Jan Schroers, udo Schwarz
|On-Site Speaker (Planned)
Even though bulk metallic glasses (BMGs) are known since over two decades, many of their atomic-scale properties are yet to be fully understood. Among these properties, yielding and the related atomic-scale plastic flow that follows yield are a must-know behaviors when considering the use of BMGs in structural applications. However, detailed knowledge is lacking due to the difficulty of conducting well-defined room-temperature plastic deformation experiments at the atomic scale. Here, we extend earlier work carried out on Pt57.5Cu14.7Ni5.3P22.5 that was able to measure flow in volumes containing as little as 1000 atoms [J. Yu et al., Comm. Mat. 2:22 (2021)] to compare samples prepared with different fictive temperatures. For these samples, we correlate the local yield stresses found with the fictive temperatures of the samples, thereby confirming the earlier finding that the local atomic-scale yield stress is much higher than found by conventional nanoindentation testing.
||High-Entropy Alloys, Characterization,