| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
High-Speed Imaging Investigation and Process Mapping of the Plume Behavior in Laser Powder Bed Fusion |
| Author(s) |
Alexander J. Myers, Christian Gobert, Jack L. Beuth, Jonathan A. Malen |
| On-Site Speaker (Planned) |
Alexander J. Myers |
| Abstract Scope |
The laser's small spot size and high power in laser powder bed fusion (LPBF) lead to peak melt pool temperatures above the boiling point of common alloys, resulting in the formation of a metal vapor plume. In this work, overhead high-speed imaging experiments were conducted with varying processing conditions and materials to understand the effect of each on the plume's size and trajectory. A U-Net convolutional neural network (CNN) was trained to segment the plume from experimental images. The overhead images were then used to process map the plume across process parameters such as scanning velocity, power, and shielding gas flow. This experimental study increases our understanding of the plume's behavior at the melt-pool scale in LPBF and can be used to inform parameter selection for minimal laser-plume interaction, validate multi-physics models of the plume, and provide optimum parameters for avoiding plume interference in melt-pool imaging. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |