| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
F-37: Determination of Process Parameters from Bead-on-Plate Experiments for AA6061 in Laser Powder Bed Fusion |
| Author(s) |
Sivaji Karna, Rimah Al-Aridi, Tianyu Zhang, Timothy Krentz, Dale Hitchcock, Andrew Gross, Lang Yuan |
| On-Site Speaker (Planned) |
Sivaji Karna |
| Abstract Scope |
Bead-on-plate experiments were conducted on Al 6061 plate informed by numerical simulations to cover a wide range of cooling rates. A parameter set of laser powers and speeds were selected based on the melt pool morphology to study the printability of AA 6061 in the Laser Powder Bed Fusion (LPBF) additive manufacturing process. Various hatch spacings, proportional to the measured melt pool width, were examined to understand their impact on defect formation, including pores and cracks. Samples were characterized using optical and scanning electron microscopes. Generally, an increase in hatch spacing leads to a decrease in porosity with an increase in cracks for a higher energy density condition. Porosity increased with an increase in hatch spacing for lower energy density conditions. The perspectives to translate the bead-on-plate information to parts were discussed for guiding the selection of optimal process conditions for AA6061. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, |