| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Impact of Powder Deposition Parameters on Powder Catchment Efficiency in Laser Directed Energy Deposition |
| Author(s) |
Colin Ancalmo, Sneha Prabha Narra |
| On-Site Speaker (Planned) |
Colin Ancalmo |
| Abstract Scope |
Blown powder laser directed energy deposition (L-DED) is subject to low end-to-end material efficiencies resulting from the yield of gas atomized powder below 150μm and in-process powder catchment efficiencies (usually < 50%). These inefficiencies become important as feedstock procurement represents about 20% of the cost and 30% of the energy consumed for typical parts. Higher catchment efficiencies require smaller powder spot diameters for a fixed melt pool, and powder spot diameter is influenced by powder mass flow rate, nozzle carrier gas flow rate, and nozzle standoff distance. However, the relationship between these powder deposition parameters and catchment efficiency is not known. This work uses low-cost imaging and computer vision-based feature extraction to capture powder spot diameter for AISI 420 powder under different powder deposition parameters. The results from deposition experiments will determine whether powder deposition parameters can be optimized for increased powder catchment efficiency. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |