About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing for Energy Applications IV
|
Presentation Title |
Process Maps Using Fluid Dynamics Models in Single-laser Tracks for Additive Manufacturing |
Author(s) |
Adrian S. Sabau, Narendran Raghavan, Lang Yuan, John Turner, Vipul Gupta |
On-Site Speaker (Planned) |
Adrian S. Sabau |
Abstract Scope |
In order to obtain the processing envelope of the laser fusion process, a wide range for laser power and laser scan speed were investigated. Microstructure variation was assessed via a columnar-to-equiaxed transition (CET) model during rapid solidification. EBSD micrographs from single-tracks laser fusion experiments were used identify the number of nucleation sites per unit volume, which is one of the most important parameters in Hunt’s CET model. Single-tracks laser fusion (STLF) were simulated using a heat-transfer-solidification-only (HTS) model and its extension with fluid dynamics (HTS_FD) model using Truchas parallel open-source code. In order to cover the entire power-speed processing space, six power levels (50 to 300 W), and six laser speeds (0.1 to 1 m/s), were selected for conducting multi-physics STLF process simulations. Numerical simulation results for the HTS_FD indicated that the fluid flow effects must be considered when developing the process map for laser fusion process. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Solidification |