About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Nucleation and Growth of Al3Ti Intermetallics in Al-based Metal Matrix Nanocomposites: Insights from Phase Field Modeling |
Author(s) |
Lingxia Shi, Jason Landini, Jaime Perez Coronado, Jonathan Goettsch, Shanmukha Kiran Aramanda, Ashiwin Shahani, Alan Taub, Katsuyo Thornton |
On-Site Speaker (Planned) |
Lingxia Shi |
Abstract Scope |
Presence of inert nucleants is known to change solidification microstructures. Phase-field modeling, which is based on principles of thermodynamics and kinetics, is a powerful computational tool for studying microstructure evolution and phase transformations. In collaboration with experimentalists, we develop phase-field models for the processing of Al-based metal matrix nanocomposites (MMNCs), aiming to achieve improved understanding and control of microstructure evolution. Our work focuses on understanding the formation mechanism of orthogonal Al3Ti intermetallic plates specifically the heterogeneous nucleation behavior on TiC nanoparticles, and the subsequent growth process. We incorporate anisotropic surface energy into a binary solidification model to reproduce the experimentally observed anisotropic growth of Al3Ti intermetallic plates, and examine the interactions with other TiC particles during the solidification process. By leveraging this phase-field model, we provide insights into the formation of resulting microstructures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Aluminum, Phase Transformations |