| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Laser Manufacturing of High-Performance Materials
|
| Presentation Title |
Elucidating Balling Phenomenon in Laser Melting Using In-Situ X-Ray Radiography |
| Author(s) |
Tharun Reddy, Zane Taylor, Philip DePond, Maureen Fitzpatrick, Kwan Kim, Wei Li, Peter Lee, Chu Lun Alex Leung, Kaila Bertsch, Leora Dresselhaus-Marais |
| On-Site Speaker (Planned) |
Tharun Reddy |
| Abstract Scope |
The productivity of metal additive manufacturing technologies is primarily controlled by laser power and scan velocity. While higher productivity can be achieved with increased power and velocity, these parameters often result in balling defect, causing discontinuities along the melt track that lead to porosity. Balling significantly limits build rates; therefore, understanding the physical origins of balling is essential for developing mitigation strategies. We utilized synchrotron high-speed X-ray radiography to directly observe the dynamics of balling formation and evolution during laser melting of Tantalum. We will report on the correlation between melt pool morphology, scan velocity, and the accumulated material along the melt track characteristic of the balling defect. These findings expand our scientific understanding and have the potential to support the development of effective mitigation strategies, enabling higher printing speeds while maintaining high part quality, which is essential for adoption as a full-scale production technology. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, High-Temperature Materials |