About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Modeling of Location-Specific Microstructures in Additive Manufacturing of Metallic Alloys by Combining Nonequilibrium Phase-Field and Fast Thermal Models |
Author(s) |
Jose Mancias, Robert Saunders, Damien Tourret, Raymundo Arroyave |
On-Site Speaker (Planned) |
Jose Mancias |
Abstract Scope |
Additively manufactured metallic microstructures depend on the alloy and processing parameters as well as the geometry of the printed part. In this study, we aim to capture location-specific microstructural heterogeneities by combining a geometry-aware thermal model, the NRL Enriched Analytical Solution Method (NEASM), [Additive Manufacturing 25 (2019) 437] with a phase-field (PF) approach for rapid solidification [Computational Materials Science 188 (2021) 110184]. The PF model is used to generate microstructures in various regions (e.g. in the presence of corner, edges, etc.) of the part using thermal conditions provided by the NEASM. The PF model is based on the relaxation of the partition coefficient at the solid-liquid interface (which relaxes the equal diffusion potential condition of conventional phase field models) and is GPU parallelized in Julia. By combining the PF and NEASM methods, the prediction of location-specific microstructure heterogeneities due to part geometry in powder-bed fusion processes is possible. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Solidification |