| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
A-60: Understanding Surface Roughness on Vertical Surfaces via Computational Simulations in Laser Powder Bed Fusion Additive Manufacturing |
| Author(s) |
Zilong Zhang, Tianyu Zhang, Lang Yuan |
| On-Site Speaker (Planned) |
Zilong Zhang |
| Abstract Scope |
The surface roughness of additively printed components via laser powder bed fusion is contributed by partially melted particles, melt tracks, spatters and the dross formation. In this study, different processing parameters corresponding to different melt pool instability and the solidification behaviors on top and vertical surfaces. Cubic samples were printed to observe the correlations of the melt pool size, solidification microstructure and surface roughness. The same conditions were simulated by the commercial software package, Flow3d, to interpret the experimental results. The model solves the general physics of heat transfer, solidification, vaporization, and fluid dynamics. Representative regions consisted of multiple tracks and multiple layers were simulated to predict the melt pool behaviors, including balling, and the thermal history on the surfaces. The simulation results explain the formation of the observed dominant surface features, revealing the underlying mechanisms that drive surface roughness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, Modeling and Simulation |