About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Process Development
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Presentation Title |
Laser-material Interactions in LPBF, Visualised through Optical and X-ray High-speed Imaging |
Author(s) |
Ioannis Bitharas, Niranjan Parab, Cang Zhao, Tao Sun, Anthony Rolett, Andrew J Moore |
On-Site Speaker (Planned) |
Ioannis Bitharas |
Abstract Scope |
We present results from our latest visualisation studies of atmospheric effects during LPBF. The interactions between the laser, metallic vapour, particles, and gas cross-flow during multilayer builds are analysed both experimentally and through multiphysics modelling. We examine the production of process by-products, characterise their extraction and highlight the most important factors. 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. Image processing and analysis aid in relating our observations to process stability. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |