| About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
| Presentation Title |
(On-Demand) Investigation of Particle Dynamics During Laser Powder Bed Fusion via a Novel Smooth Particle Hydrodynamics Modeling Approach |
| Author(s) |
Christoph Meier, Patrick M. Praegla, Reimar Weissbach, John Hart, Wolfgang A. Wall |
| On-Site Speaker (Planned) |
Christoph Meier |
| Abstract Scope |
Melt pool dynamics in laser powder bed fusion (LPBF) are highly dynamic and include particle redistribution and denudation, and ejection of spatter. These effects are inherent to the nominal process, yet can lead to defects in the final part. For computational models of LPBF to give the most useful insights, it is necessary to accurately represent the fluid and gas flows, interface forces, and powder dynamics. We have developed a novel model for thermo-capillary phase change problems that considers the full range of relevant interface forces at the melt pool surface, explicitly resolves the atmospheric gas phase, and models mobile powder particles. Using this model, we investigate the influence of powder cohesiveness on melt pool and powder dynamics, and focus on evaporation-induced powder material redistribution and particle ejection. Our results also show how powder mobility and melt track uniformity are related to layer quality (e.g., packing density). |
| Proceedings Inclusion? |
Undecided |