| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium on Thermodynamics of Microstructure Stability and Evolution
|
| Presentation Title |
Phase-field modeling of far-from-equilibrium solidification microstructures |
| Author(s) |
Alain S. Karma, Kaihua Ji, Mingwang Zhong, Amy Clarke |
| On-Site Speaker (Planned) |
Alain S. Karma |
| Abstract Scope |
Solidification processing of metallic alloys can take place over an extremely wide range of solid-liquid interface velocities spanning six orders of magnitude from constitutional supercooling to absolute stability. Rapid developments in additive manufacturing have renewed the interest in modeling the high-velocity range where approximate analytical theories provide limited predictions. This talk will discuss a new phase-field formulation of rapid solidification of metallic alloys that quantitatively incorporates non-equilibrium effects at the solid-liquid interface while remaining computationally tractable to carry out simulations on experimentally relevant length and time scales. Simulation results, validated by quantitative comparisons to thin-film solidification experiments, will be presented that illustrate how this new formulation has yielded unprecedented insights into high-velocity interface dynamics. The results shed new light on both the absolute stability limit and the formation of banded microstructures that are a hallmark of rapid alloy solidification near this limit. |
| Proceedings Inclusion? |
Planned: |