About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Fundamental Science of Microstructural Evolution and Phase Transformations: An MPMD/FMD/SMD Symposium in Honor of Peter Voorhees
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| Presentation Title |
Multi-Scale Analysis of Grain Orientations and Defect Evolution in Rapid Solidification |
| Author(s) |
Nikolas Provatas, Tatu Pinomaa, Sammohith Nittala, Jaarli Suviranta, Duncan Burns, Thomas Voisin, Joseph T. McKeown, Anssi Laukkanen |
| On-Site Speaker (Planned) |
Nikolas Provatas |
| Abstract Scope |
Rapid solidification of critical metals under rapid laser heating is fundamental to additive manufacturing processes. This regime of crystallization gives rise to complex defect-microstructure interactions and non-equilibrium kinetics that strongly effect solid phases that form. This talk will review new phase field type (PF/PFC) modelling research that sheds light on the evolution of rapidly solidified microstructures across multiple length and time scales. At the mesoscale, we compare grain orientation selection in rapidly solidified Al versus Al-Cu alloys grown under continuous growth kinetics and experimentally extracted thermal histories, comparing the results to DTEM experiments. At the nanoscale, we probe the competition of kinetic and surface energy anisotropy and density trapping in directionally solidified aluminum grains, showing how these effects give rise to spatio-temporally varying polygonization and sub-gran structures, as well as complex 3D dislocation networks. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Phase Transformations, Additive Manufacturing |