|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Advanced Manufacturing
||Combining CALPHAD-informed Phase-field Modeling with Rapid Solidification Experiments for Prediction of Microstructure Evolution during Laser-based Additive Manufacturing
||Aurelien Perron, John Roehling, Patrice E.A. Turchi, Jean-Luc Fattebert, Joseph McKeown
|On-Site Speaker (Planned)
The coupling of phase-field modeling (PFM) to thermodynamic and kinetic databases (CALPHAD methodology) is important for realistic parameterization of PFM. The present work aims at studying solidification in metallic alloys from “equilibrium” to far-from-equilibrium conditions to address the challenge of rapid-solidification processes encountered during laser-based additive manufacturing (AM). Modeling successes and challenges will be discussed and compared with experimental data. Experiments consist of laser surface melting and re-solidification in bulk alloys and in situ laser melting and rapid solidification in thin-film alloys. The latter approach, conducted in the dynamic transmission electron microscope (DTEM), permits to track the kinetics of the solidification front, and to monitor the microstructure evolution during solidification.
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.
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