| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Correlation of Keyhole Geometry with Spatters and Droplets during Laser Powder Bed Fusion Additive Manufacturing of Aluminium |
| Author(s) |
Da Guo, Rubén Lambert-Garcia, Ravi Shahani, Martha Majkut, Alexander Rack, Chu Lun Alex Leung, Peter D. Lee |
| On-Site Speaker (Planned) |
Da Guo |
| Abstract Scope |
Laser powder bed fusion (LPBF) is a prominent additive manufacturing (AM) technology that enables near net shape manufacturing of metal components with complex, optimized designs, low lead times and no tooling costs. Improved alloys and better LPBF technologies are expanding the range of LPBF applications. To achieve the required component quality, spatter and droplet formation during the process should be controlled to avoid unacceptable porosity and/or surface roughness. High-speed synchrotron X-ray imaging at ESRF-ID19 was utilised to gain insights into spatter/droplet formation during LPBF of an aluminium alloy. Different types of spatters/ droplets were identified and classified by size and circularity. Further quantification, such as number, trajectory angle and velocity were analysed as a function of processing parameters and keyhole geometry. In addition, the in-process data allows quantification and analysis of solid-liquid coalescence, liquid-liquid coalescence and spatter-laser interaction, and provides insights into the mechanisms behind spatter/droplet formation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |