About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Laser-material Interactions in LPBF, Visualised through Simultaneous X-ray and Schlieren High-speed Imaging |
Author(s) |
Ioannis Bitharas, Tao Sun, Anthony D. Rollett, Andrew J. Moore |
On-Site Speaker (Planned) |
Ioannis Bitharas |
Abstract Scope |
We present results from visualisation studies of atmospheric fluid dynamics during LPBF. The interactions between the laser, metallic vapour, particles, and gas cross-flow are analysed both experimentally and through multiphysics modelling. Simultaneous synchrotron x-ray and schlieren imaging experiments give insight into the joint behaviour of the melt pool, laser plume, and powder particles. The interconnected dynamics of the vapour and liquid phases are explored under varying energy input. Fundamental laser-powder interactions, as well as the effect that the powder layer has on melt pool and plume dynamics are investigated. Image processing and analysis aid in relating our observations to process stability. Our results show that even monitoring the laser plume alone can yield valuable information about the state of the melt pool and processing regime. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |