| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure and Dynamics of Metallic Glasses
|
| Presentation Title |
Glass Formation and Crystallization of Metallic Materials |
| Author(s) |
Yuanchao Hu |
| On-Site Speaker (Planned) |
Yuanchao Hu |
| Abstract Scope |
In recent years, we have been focusing on studying the crystallization kinetics and its structural origin in supercooled metallic liquids to understand the physical mechanism of glass formation. By using prototypical metallic systems with distinct glass-forming abilities, we performed molecular dynamics simulations to monitor the crystallization process. We also utilized enhanced sampling methods to measure the thermodynamics and fine-tune the local orderings. We identified the critical role of liquid-crystal interfacial energy in not only crystal nucleation but also in crystal growth. Microscopically, the interfacial energy is determined by the nontrivial coupling between local structural and compositional orderings. The formation of crystal-like pre-orderings effectively wets the nuclei and reduces the topological and chemical gradients at the interface, which decreases the interfacial energy and facilitates crystallization. The exceptional importance of competing ordering effects and local chemical orderings unique to metallic glasses is revealed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Phase Transformations, Solidification |