About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
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Presentation Title |
Using High-speed Imaging to Inform Process-control Models in Laser Powder Bed Fusion |
Author(s) |
Andrew Moore, Kyle Perkins, Ioannis Bitharas |
On-Site Speaker (Planned) |
Andrew Moore |
Abstract Scope |
We present results from time-resolved, in-situ high-speed imaging during laser powder bed fusion (LPBF). Direct imaging and schlieren imaging, as well as simultaneous synchrotron x-ray and schlieren imaging, at the order of 10-20 thousand frames per second enabled the interconnected dynamics of the solid, liquid and vapour phases to be explored under varying energy input. These techniques provide understanding of the LPBF process stability and have been used to validate simplifying assumptions about the process and to calibrate experimentally representative heat sources for use in computationally efficient models. Conduction-only models are increasingly used in PBF to predict the thermal history for relatively large build volumes. Experimental validation enables a heat source to be selected for in-layer process planning that incorporates experimentally calibrated effects such as the laser absorption and the penetration of the vapour depression into the melt pool, which are computationally expensive to calculate from first principles. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Other, Other |