| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Presentation Title |
Using In-situ Two-color Thermal Imaging to Validate Multi-physics CFD Melt Pool Models for LPBF |
| Author(s) |
Alexander J. Myers, Guadalupe Quirarte, Francis Ogoke, Amir Barati Farimani, Jack L Beuth, Jonathan A Malen |
| On-Site Speaker (Planned) |
Alexander J. Myers |
| Abstract Scope |
An experimental method to image melt pool temperature with a single color camera was developed, and the in-situ measurements were used to better understand melt pool physics. The experimental approach leverages the principle of two-color thermal imaging, which negates the need for a priori knowledge of melt pool emissivity. The high-speed color camera's ability to accurately measure temperature was validated with a NIST blackbody source. It was then used to image 316L stainless steel single beads off-axis on the TRUMPF TruPrint3000 laser powder bed fusion machine. Multi-physics computational fluid dynamics models (CFD) are used to simulate metal melt pools, but some parameters are not well characterized for metals. Fitting a FLOW-3D model to ex-situ measurements of the melt pool cross-sectional geometry identifies multiple combinations of model parameters. Comparing the simulated temperatures to the in-situ measurements narrows the parameter selection, motivating the need for thermal imaging to advance CFD model validation. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |