About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
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| Presentation Title |
Non-Equilibrium Partitioning and Cellular Growth in Alloys: A Quantitative Multiscale Modeling Approach |
| Author(s) |
Sepideh Kavousi, Mohsen Asle Zaeem |
| On-Site Speaker (Planned) |
Sepideh Kavousi |
| Abstract Scope |
Accurate modeling of rapid solidification in additive manufacturing requires predictive tools for non-equilibrium interfacial phenomena such as solute trapping and growth kinetics. We integrate molecular dynamics and quantitative phase-field modeling to simulate solute partitioning, solute drag, and cellular interface morphology across a wide range of solidification velocities. A tailored anti-trapping flux is introduced, enabling phase-field predictions consistent with the sharp-interface continuous growth model, independent of interface width. Our simulations capture the transition from equilibrium to non-equilibrium partition coefficients and show that dendritic arm spacing and solute profiles exhibit minimal sensitivity to the diffuse interface width, enabling efficient, large-scale simulations. Validation using experimental data for Si–As and molecular dynamics results for Ti–Ni alloys shows strong agreement across the diffusive velocity regime. This integrated computational framework enables parameter-free, physics-based predictions of microstructural evolution and solute distribution under AM-relevant solidification conditions, advancing the predictive design of additive manufacturing processes.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |