About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Solid–Liquid Interface Velocity and Its Relation to Solute Distribution and Heterogeneity in Rapidly Solidifying Alloys |
| Author(s) |
Anqi Qiu, Miao He, Yang Li, Bita Ghaffari, Yang Huo, Fei Xue, Larry Godlewski, Danielle Zeng, Mei Li, Yue Fan |
| On-Site Speaker (Planned) |
Anqi Qiu |
| Abstract Scope |
Al-Si alloys are widely used as structural materials in aerospace and automotive industries due to their excellent castability, corrosion resistance, high strength-to-weight-ratio, etc. We present a comprehensive atomistic simulation study of the solidification of Al-Si alloys under various Si solute concentrations and undercooling conditions, using a solid-liquid coexisting system. In this process, the liquid region will solidify as the solid-liquid interface moves through it. At different solute concentrations and undercooling temperatures, the solid-liquid interface velocities are different, and so are the spatial distributions of Si solute atoms in the solidified structures. In some cases, the interface becomes unstable and high roughness is observed, which is correlated with intermediate interface velocities and high spatial heterogeneity of Si atoms in the solidified structure. Analysis of the total drag force on Si solutes in the interface region shows that high interface roughness and spatial heterogeneity occurs due to high drag force. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Aluminum, Solidification |