About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Global Local Modeling of Melt Pool Dynamics and Bead Formation in Laser Bed Powder Fusion Process Using a Comprehensive Multi-Physics Simulation |
Author(s) |
Faiyaz Ahsan, Jafar Razmi, Leila Ladani |
On-Site Speaker (Planned) |
Faiyaz Ahsan |
Abstract Scope |
Understanding the physical mechanism of laser powder bed fusion (LPBF) additive manufacturing process can benefit significantly through computational modeling. LPBF is a state-of-the-art manufacturing process which involves rapid heating of the powder bed by the laser heat source and subsequent flow of fluid and solidification around melt pool. This work aims to assess the impact of various process parameters like laser power, scan speed on the shape and geometry of the solidified bead from melt pool, which dictate the final build property and establish a relation between them to optimize the process. The computational model was be validated by comparing the result with experiment. This work also attempts to calculate the convective heat transfer coefficient around melt pool region during LPBF process. Marangoni convection, recoil pressure and buoyancy force are included to properly simulate the melt pool dynamics along with non-gaussian beam to model the laser-powder interaction. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Powder Materials |