| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Real-Time Pore Dynamics During Additive Manufacturing of Oxidized Powders Using Correlative X-Ray and Optical Imaging |
| Author(s) |
Kwan Kim, Samy Hocine, Wei Li, Shishira Bhagavath, Anna Getley, Rubén 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. However, the unfused particles are often discarded or recycled, rather than reused. Powder waste poses sustainability and cost challenges to the LPBF process. To address these concerns, powder recycling has gained attention; however, the powder can become oxidized during use, and the effects of powder oxidisation on the LPBF process dynamics and defect formation mechanisms remains largely unexplored. Here, we examine the impact of powder oxidation on melt pool dynamics and porosity generation using in situ and operando correlative X-ray/optical imaging, focusing on the Ti-6Al-4V. We identify a shift of the keyhole porosity boundary in the laser power-velocity process map; however, regimes where oxidized powder can be processed without pores were revealed. This research forms a foundation for qualifying materials and processes for increased reuse of oxidized powders during LPBF, providing guidance to end-users, enhancing sustainability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Sustainability |