About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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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 |
Reveal Pore Dynamics during Additive Manufacturing of Oxidized Powders Using Synchrotron X-ray Imaging |
Author(s) |
Kwan Kim, Samy Hocine, Wei Li, Anna Getley, Ruben Lambert-Garcia, Elena Ruckh, Maureen Fitzpatrick, Sebastian Marussi, Marta Majkut, Alexander Rack, Joseph Oluleke, Peter Lee, Chu Lun Alex Leung |
On-Site Speaker (Planned) |
Kwan Kim |
Abstract Scope |
Laser powder bed fusion (LPBF) enables fabrication of complex structures by fusing powder particles, which can be reused, recycled, or discarded. Powder waste poses sustainability and cost challenges. To address these concerns, powder recycling has gained attention, however, the effects of oxidized powder on the LPBF process dynamics and defect formation mechanisms remain largely unexplored. Here, we examine the impact of powder oxidation on melt pool dynamics and porosity generation using in situ and operando synchrotron X-ray imaging. We identified a shift on the keyhole porosity boundary in the laser power-velocity map, however, there are regimes where oxidized powder can be processed without pores. This research forms the foundation for qualifying materials and processes in LPBF of oxidized powders, providing guidance to end-users on powder reuse or discard, thus enhancing sustainability. |
Proceedings Inclusion? |
Planned: |