| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Rapid Solidification of Polycrystalline Al-Cu with a Quantitative Phase Field Model and In-situ Imaging |
| Author(s) |
Tatu Pinomaa, Joseph T McKeown, Anssi Laukkanen, Jörg Wiezorek, Nikolas Provatas |
| On-Site Speaker (Planned) |
Tatu Pinomaa |
| Abstract Scope |
A quantitative polycrystalline phase field model is used to analyze the solidification in Al-Cu under conditions corresponding to dynamic transmission electron microscopy (DTEM) experiments. The sharp interface limit of the phase field model is set through a recent matched asymptotic analysis to follow the solute trapping kinetics of the Continuous Growth Model. A new vector order parameter formulation is introduced, which allows better control of grain boundary energy and consistent noise-based nucleation. The phase field simulated microstructures are compared to experiments, including time-resolved DTEM images and as-solidified samples. The morphological features of the simulated microstructures agree well with the experiments, and the corresponding simulated concentration profiles are in qualitative agreement with the experimental concentration maps. Combining phase field simulations and DTEM experiments allows one to calibrate hard-to-determine kinetic parameters such as the kinetic coefficient, to validate assumptions related to heat transfer modeling, and to investigate the fundamentals of rapid solidification. |
| Proceedings Inclusion? |
Planned: |