About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Simulation of Molten Pool Dynamics during Metallic Additive Manufacturing |
Author(s) |
Lu Wang, Wentao Yan |
On-Site Speaker (Planned) |
Lu Wang |
Abstract Scope |
The molten pool flow, particularly the keyhole effect, plays a critical role in defect formation in additive manufacturing and welding processes. In this study, we derive an evaporation model for metal alloys considering the gas flow structure and material composition and implement it in a multi-physics thermal-fluid flow model, which utilizes the volume of fluid (VoF) in the finite volume method (FVM) to capture free surfaces and the ray-tracing method to track multi-reflections of the laser within the keyhole. Furthermore, a Thermoelectric Magnetohydrodynamic (TEMDH) model is developed by incorporating the electrodynamic model with the Seebeck effect into the multi-physics thermal-fluid flow model to manipulate the molten pool flow and grain growth. Both models are validated against the experiment results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Modeling and Simulation |