| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Atomic cluster dynamics and transport in metallic glasses |
| Author(s) |
Birte Riechers, Zengquan Wang, Amlan Das, Eric Dufresne, Peter Derlet, Robert Maass |
| On-Site Speaker (Planned) |
Robert Maass |
| Abstract Scope |
In search for a structural understanding of aging of metallic glasses, we exploit here the ability to track atomic-scale dynamics via x-ray photon correlation spectroscopy (XPCS). Conducted across temperatures and under the application of stress, the results reveal non-monotonically evolving and fluctuating relaxation times throughout isothermal conditions, which indicates heterogeneous dynamics at the atomic scale. In concert with atomistic simulations, we identify possible mechanisms of correlated atomic-scale dynamics that can underlie the temporal fluctuations and structural decorrelations (Acta Materialia 267 (2024) 119730). Furthermore, a transition from classical stretched exponential to power-law decorrelations emerges at sufficiently long waiting times, which we interpret as a signature of anomalous transport (Nature Communications (2024) in press). We discuss these findings in the context of an emerging microstructure in metallic glasses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Modeling and Simulation |