| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
| Presentation Title |
Quantifying Impact of Fluid Flow on Melt Pool Model Predictions Across AM Processing Regimes |
| Author(s) |
Gerry L. Knapp, Matthew Rolchigo, Tarasankar DebRoy, Jim Belak, Alex Plotkowski |
| On-Site Speaker (Planned) |
Gerry L. Knapp |
| Abstract Scope |
During additive manufacturing (AM) the molten pool dynamics govern key processing outcomes, importantly the solidification conditions and the resulting microstructure. Flow driven by thermocapillary forces is known to contribute significantly to heat transfer that controls solidification conditions under many conditions. However, computational fluid dynamics calculations are computationally expensive compared to simpler approximate heat transfer calculations. Through nondimensionalization of process and material characteristics, here a dimensionless parameter is developed to correlate with the effects of fluid flow on molten pool geometry and microstructure across a range of processing conditions. Modeling results are used to prove correlation and discuss physical interpretation. Selected cases coupled with cellular automata calculations demonstrate how important fluid flow is to grain structure under different additive manufacturing processing regimes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, |