About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
High Fidelity Modeling of Laser Absorptivity and Molten Pool Geometry During Powderbed Fusion Processes of Ti64Al4V with the Stationary and Moving Laser Beam Sources |
Author(s) |
Akash Aggarwal, Yung C. Shin |
On-Site Speaker (Planned) |
Yung C. Shin |
Abstract Scope |
During additive manufacturing, absorption of laser energy into the target material changes with the evolution of keyhole. This study presents the high-fidelity modeling of Ti6Al4V alloy for two different laser powderbed fusion processes. The model accounts for all the relevant physics including Fresnol absorption via ray tracing. The first case is shown for stationary laser heating, where the dynamic evolution of keyhole formation prediction is predicted and compared with synchrotron measurements. Excellent agreement is shown between the prediction and synchrotron measurements in temporal keyhole depth. The second case is the single-track powderbed fusion process of Ti6Al4V with continuous scanning at different power levels and scanning speeds. A good agreement between the predicted and measured results is achieved. Different effective absorptivity values are determined for both the stationary and moving laser beams. The effects of different thermal conductivity on the predicted track and fusion zone geometry are also described. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Titanium |