About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Twin-Induced Variability in Interfacial Anisotropy and Microstructural Evolution during Solidification of Aluminum Alloys |
| Author(s) |
Sepideh Kavousi, Mohsen Asle Zaeem |
| On-Site Speaker (Planned) |
Sepideh Kavousi |
| Abstract Scope |
The formation of growth twin boundaries during the solidification of aluminum and aluminum–copper alloys can lead to solute segregation bands and crystallographic heterogeneities, ultimately degrading mechanical and fatigue performance. One proposed mechanism for their formation is linked to variations in the anisotropy of the solid–liquid (SL) interface. However, conventional molecular dynamics and phase-field simulations typically assume ideal, defect-free SL interfaces and overlook the feedback effects of twin boundary formation on interfacial thermodynamic and kinetic properties. In this study, we adopt a multiscale approach to investigate how the presence and evolution of twin boundaries alter anisotropic SL interfacial properties and influence larger-scale solidification outcomes, including preferred growth orientations, dendritic morphology, and solute segregation patterns. Our findings emphasize the critical role of defect-sensitive anisotropy in governing microstructure evolution and provide new insight into predictive modeling strategies for aluminum alloy processing and design. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Solidification, Modeling and Simulation |