| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
The Improvement of Surface Roughness on Vertical Surfaces for 316L Stainless Steel in Laser Powder Bed Fusion Additive Manufacturing |
| Author(s) |
Tianyu Zhang, Lang Yuan |
| On-Site Speaker (Planned) |
Tianyu Zhang |
| Abstract Scope |
In the laser powder bed fusion process, the surface roughness plays an important role in the geometrical accuracy and mechanical properties. Understanding and improving the surface roughness is required to improve the quality of products. In the prior study, the roughness of vertical surfaces is dominated by the dross formation under high laser energy density conditions and by partially melted particle and melt pool tracks under low energy density conditions. In this study, Alternating contour parameters, implementing contour remelting, and utilizing pulse laser are executed to improve the vertical surface roughness by eliminating the factors listed above. The surface roughness is measured by Keyence optical microscopy and the melt pool morphology and microstructure are gathered from the cross-section view via SEM. The effectiveness and underlying mechanisms of the different methods are analyzed and discussed based on the experiment results. Better surface quality has been achieved under different energy density levels. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Surface Modification and Coatings |