| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Techniques for Multi-Scale Modeling in Advanced Manufacturing
|
| Presentation Title |
Investigation of Powder Spattering in Laser Powder Bed Fusion through Multi-physics Modeling and High-speed Synchrotron X-ray Imaging |
| Author(s) |
Xuxiao Li, Qilin Guo, Zachary Young, Fangzhou Li, Lianyi Chen, Wenda Tan |
| On-Site Speaker (Planned) |
Xuxiao Li |
| Abstract Scope |
In the laser powder fusion process, the powder spattering contributes to the formation of defects such as lack-of-fusion and surface irregularity. The powder-gas interaction that triggers such spattering can be inferred from experimental observations but has not been well quantified. In this work, we use a synergistic experimental/numerical approach to investigate the powder-gas interaction and the resultant powder spattering behavior. On the experimental side, the synchrotron X-ray imaging is used to observe the powder spattering in the cases with different laser power, laser scanning speed, and ambient pressure. On the modeling side, a three-dimensional multiphysics model that captures the multi-phase thermofluidic dynamics and powder dynamics will be used to quantitatively predict the force(s) of gas-powder interaction in different cases. The combination of the experimental and numerical results will provide a comprehensive understanding of the physical mechanisms of powder spattering in the process. |
| Proceedings Inclusion? |
Planned: |