About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
An Atomic-level Perspective of Shear Banding in Metallic Glasses |
Author(s) |
Daniel Sopu, Jürgen Eckert |
On-Site Speaker (Planned) |
Daniel Sopu |
Abstract Scope |
Over the last decades considerable efforts have been done to better understand the mechanisms controlling shear banding in metallic glasses. Atomistic simulations highlight the importance of nanoscale stresses and strains heterogeneity, but corresponding experimental proofs are scarce due to limited characterization techniques. Here, by means of MD and athermal quasi-static simulations we derive an atomistic description of the relationship between the deformation behavior of metallic glasses and their intrinsic properties. The shear band characteristics are evaluated using the two-unit STZ-vortex mechanism. A series of fundamental insights into shear band formation, shear band branching and multiplication or the transition from shear banding to cracking are revealed. Some of these results are, for the first time, corroborated by experimental observations performed at the nanoscale level and obtained by using precession nanodiffraction mapping in the transmission electron microscope. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Mechanical Properties |