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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Computational Thermodynamics and Kinetics
Presentation Title J-23: Smoothed Boundary Method for Simulating Intermetallic Growth in the Presence of Nanoparticles: Application to Al-Based Metal Matrix Nanocomposites
Author(s) Jason Landini, Lingxia Shi, Jonathan Goettsch, Shanmukha Kiran Aramanda, Jaime Perez Coronado, Alan Taub, Ashwin Shahani, Katsuyo Thornton
On-Site Speaker (Planned) Jason Landini
Abstract Scope Al-based in-situ metal-matrix nanocomposites (MMNCs) have shown promise as lightweight materials offering high strength at elevated temperatures. Though in-situ MMNCs can be less costly than their ex-situ counterparts, complex solidification pathways affect resultant microstructures and their properties. In this work, we simulate Al3Ti intermetallic solidification and its interaction with TiC nanoparticles through phase-field modeling. The Smoothed Boundary Method is employed to introduce inert particles and allows for the adjustment of contact angle at the intermetallic/nanoparticle interface. We observe that the pushing and engulfment of nanoparticles perturb the solidification front of the Al3Ti and the resulting morphologies. Further exploration of nanoparticle morphology and size within the parameter space allows reproduction and insight into the observed behavior in an Al-TiC MMNC produced via salt-flux reaction synthesis. This study of intermetallic/nanoparticle interactions and how to control their effects on microstructure formation can assist in the informed materials design of in-situ MMNCs.
Proceedings Inclusion? Planned:

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