About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
On the Correlation between Multiscale Structural Heterogeneities and Mechanical Properties in Metallic Glasses |
Author(s) |
Dong Han, Yunjiang Wang, Yanfei Gao |
On-Site Speaker (Planned) |
Dong Han |
Abstract Scope |
Atomic and microscopic heterogeneities play a critical role in governing the physical and mechanical properties of metallic glasses. A general theoretical protocol is proposed to describe the link via a statistical parameter quantifying the dynamic heterogeneity of glass-forming systems. The parameter can be calculated using the concept associated with the variation in the activation barriers to local structural excitations on the underlying potential energy landscape, which can be explored extensively using the recently developed activation-relaxation technique in inherent structures spanning a wide range of configurational space. During the process, the relationships between the multiscale heterogeneities and macroscopic plasticity are clearly captured. With increasing structural relaxation, the diversity of structural energy states drops by a large amount of magnitude. The mechanical behavior is a consequence of the convolution of the intrinsic thermal activation process and such heterogeneities. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Computational Materials Science & Engineering, Modeling and Simulation |