About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Algorithm Development in Materials Science and Engineering
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Presentation Title |
Using 2D, Dendrite-resolved, Melt-pool-scale Phase-field Simulations of Solidification as Reference Solutions for a Multiscale Model |
Author(s) |
Yigong Qin, Yuanxun Bao, Stephen J. DeWitt, Balasubramaniam Radhakrishnan, George Biros |
On-Site Speaker (Planned) |
Stephen J. DeWitt |
Abstract Scope |
Solidification during additive manufacturing has several relevant length scales. Overlap between these scales calls into question scale separation assumptions in many multiscale modeling methods. We present a new approach to examine the interplay of phenomena at the melt pool, grain, and dendrite scales and whether it is captured in a multiscale model. 2D, GPU-accelerated, polycrystalline, dendrite-resolved, melt-pool-scale phase-field simulations are used as reference solutions. The multiscale model consists of a melt-pool-scale thermal model (macroscale model) and phase-field simulations of a few dendrite arms growing epitaxially from a base plate grain (microscale model). Most microstructural features are accurately represented in the multiscale model, except the primary dendrite arm spacing. We discuss the impact of these findings on multiscale modeling of additive manufacturing, including for optimally controling the heat source for a target microstructure. This abstract has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |