About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Theory and Design of Metallic Glasses
|
| Presentation Title |
Microstructure-Specific Dynamics in Metallic Glasses |
| Author(s) |
Achraf Atila, Zengquan Wang, Birte Riechers, Peter M Derlet, Robert Maass |
| On-Site Speaker (Planned) |
Robert Maass |
| Abstract Scope |
As-cast metallic glasses relax continuously as a function of time and temperature, which may lead to significant property changes. In search for a better structural understanding of aging of metallic glasses, we exploit here the ability to track atomic-scale dynamics via x-ray photon correlation spectroscopy (XPCS). We focus on isothermal annealing of a model glass in the microsecond regime, from which the XPCS experiment is simulated. Examination of the one-time intensity cross-correlations reveals a multi-stage structural decorrelation sequence, where different atomic-scale transport mechanisms can be linked to the stepwise decorrelation. Specifically, these range from thermal vibrations, glassy network evolution, and topological and chemical ordering towards crystallization. These insights promote a picture, in which the metallic model glass has dynamically well-separated microstructural evolution stages during isothermal relaxation. We discuss these findings in the context of our experimental XPCS observations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Modeling and Simulation |