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 |
High-speed synchrotron X-ray imaging of directed energy deposition of metals: the comparison of powder delivering performance, effects of processing parameters on the pore formation, and pore formation mechanisms |
Author(s) |
Hui Wang, Sarah J. Wolff, Benjamin Gould, Ziheng Wu |
On-Site Speaker (Planned) |
Hui Wang |
Abstract Scope |
Laser-based powder-blown directed energy deposition (DED) receives more and more attention in both academia and industry because it is a competitive method for repairing and remanufacturing. State-of-art DED additive manufacturing processes use both irregular and spherical powders since each of these two types of powders shows its advantages. Nowadays, most investigations focus on the comparisons of these two types of powders through the analysis of mechanical and microstructural properties. However, why the differences exist is still unknown. High-speed X-ray imaging has been proven to be a competitive method to reveal the fundamental physics of phenomena in laser additive manufacturing (AM) processes. Therefore, in situ synchrotron X-ray imaging is used to provide the fundamental understanding of powder delivering performance in the DED AM. Based on the results, high-speed X-ray imaging is extended to investigate the effects of processing parameters on pore formation and pore formation mechanisms in the DED AM process. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |