About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Influence of Powder Particle Size Distributions on Surface Topography of Polymer Laser Powder Bed Fusion Parts |
Author(s) |
Aakil Raj Lalwani, Christian Leslie Budden, Venkata Karthik Nadimpalli, Anders Egede Daugaard, David Bue Pedersen |
On-Site Speaker (Planned) |
Aakil Raj Lalwani |
Abstract Scope |
The morphology and particle size distribution of commercial polymer powders for Laser Powder Bed Fusion (LPBF) spans a wide range. This is a consequence of the traditional manufacturing methods of milling and grinding. In theory, a combination of large and fine powder particles provides dense powder packing which in turn allow for good processability and parts. This study focuses on correlating powder properties and part quality for parts manufactured with 3 different size distributions, i.e. commercial grade, narrower than commercial, and bimodal. Parts were made with polyamide-11 and on two different machines. The results indicate towards a more suitable particle size distribution for a specific material and a specific machine. Hence spending some additional resources on sieving powder prior to use can be beneficial. However, an optimization should be carried out for each powder and material to find the ideal powder size distribution corresponding to desired part quality. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |