| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
|
| Presentation Title |
Interpreting String-excitations as Beta Relaxations in a Model Glass |
| Author(s) |
Peter Derlet, Robert Maass |
| On-Site Speaker (Planned) |
Peter Derlet |
| Abstract Scope |
Localized structural excitations are studied in a model metallic glass, as a function of temperature and degree of structural relaxation. At high temperature these take the form of string-like displacements in which a linear sequence of neighboring atoms undergo displacements of a magnitude close to the average nearest neighbor distance. Such structural changes can be understood in terms of free-volume, coordination and bond-order (common-neighbor) transport, and are rationalized by rearrangements of the disclination network characterizing bond-orders deviating from the minimally frustrated configuration of five common neighbors. Because of their extended nature, these localized structural excitations directly affect the medium range order length-scale, and through their collective activity underlie glassy micro-structure evolution. We conclude with a discussion on the usage of the alpha/beta/gamma terminology applied to this model metallic glass. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, |