| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
In Situ Characterization of the Balling Phenomenon in Additive Manufacturing |
| Author(s) |
Debomita Basu, Jack Beuth, Bryan Webler |
| On-Site Speaker (Planned) |
Debomita Basu |
| Abstract Scope |
A major challenge of adopting Laser Powder Bed Fusion into an industrial setting is the relatively slow build rates characteristic of this process. Although using higher laser powers and velocities increases the build rate, undesirable surface tension defects known as the balling phenomenon, or bead-up, may form along the length of the laser track. This creates uneven surfaces for subsequent layers, which can result in embedded pore-type flaws. Since these artifacts form very quickly during the manufacturing process, real time imaging is a necessary tool used to study the formation mechanisms of this phenomenon. In this work, 316 Stainless Steel was examined to determine differences in balling behavior using optical microscopy, high-speed radiography, and IR imaging. Possible processing strategies to change melt pool shape at high powers and high velocities and mitigate balling are also discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, |