About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Simulating Alloy Solidification in the Presence of Nanoparticles: Application to Aluminum-Based Metal Matrix Nanocomposites |
| Author(s) |
Jason Landini, Jaime Perez Coronado, Alan Taub, Ashwin Shahani, Katsuyo Thornton |
| On-Site Speaker (Planned) |
Jason Landini |
| Abstract Scope |
Aluminum-based in-situ metal-matrix nanocomposites (MMNCs) have shown promise as lightweight materials offering high strength at elevated temperatures. Although in-situ MMNCs can be less costly than their ex-situ counterparts, complex solidification pathways determine the microstructures and thus their properties. In this work, we present a phase-field model for the directional solidification of a binary Al-Ti alloy containing inert TiC particles. The Smoothed Boundary Method is employed to represent inert particles, while the Navier-Stokes equations are solved to capture fluid flow and hydrodynamic drag forces on particles during solidification. This framework enables the simulation of particle motion, accounting for the competition of interfacial forces, solute effects, and fluid drag. We discuss the particle pushing-to-engulfment transition during directional solidification and the influence of parameters such as particle size, morphology, growth velocity, and flow conditions. The developed framework provides insight into solid/nanoparticle interactions and how to control their effects on microstructure formation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Aluminum, Solidification |