|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Coupling CALPHAD to Phase-field Modeling:
A Pathway to the Prediction of Microstructures in Additive Manufacturing?
||Aurelien Perron, John Roehling, Patrice Turchi, Jean-Luc Fattebert, Joseph McKeown
|On-Site Speaker (Planned)
The present study aims at combining within the CALPHAD methodology thermodynamic and kinetic simulations with phase-field modeling developed at LLNL to address the challenge of rapid-solidification processes in metallic alloys encountered during laser-based additive manufacturing (AM). Modeling successes and challenges - from the initially diffusion-controlled to the diffusionless regimes of phase transformations - will be discussed and compared with experiments conducted in the dynamic transmission electron microscope (DTEM) in Movie Mode. This last approach permits in situ observations with high spatio-temporal resolution to track the kinetics of the solidification front, and to monitor the microstructure evolution during rapid-solidification processes. This work was performed under the auspices of the U.S Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Work at LLNL was funded by the Laboratory Directed Research and Development Program under project tracking code 15-ERD-006.
||Planned: A print-only volume