| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
A Local Preheat Temperature Dependent Stochastic Finite Element Heat Source Model for Inconel 718 Laser Powder Bed Fusion |
| Author(s) |
Seth T. Strayer, Albert To |
| On-Site Speaker (Planned) |
Seth T. Strayer |
| Abstract Scope |
Thermal field prediction of laser powder bed fusion (L-PBF) via the finite element method can help optimize the process while avoiding the cost of experiments. However, these models abstract critical physics into an effective heat source model that does not readily capture the experimentally-measured melt pool size magnitude and variance, especially for multi-track cases. This work presents a novel local preheat temperature dependent stochastic heat source model to help address these issues. First, the heat source parameters are calibrated to the mean melt pool sizes for Inconel 718 L-PBF multi-track experiments. These parameters are predicted during the simulation to establish the role of a local preheat temperature metric. Second, random sampling techniques are employed to match the experimentally-measured variance within each track. Accordingly, the simulated melt pool sizes are within 10% error regarding experimental measurements up to five consecutive tracks while more closely matching the measured melt pool size variance. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |