Influence Of Particle Size Distribution And Morphology On Bulk Material Behavior, Maximum Possible Laser Scanning Speed And Properties Of AlSi10Mg Parts Produced By Laser Powder Bed Fusion (LPBF)

摘要

The authors investigated the influence of powder properties on bulk material behavior, maximum possible laser scanning speed and the properties of the final parts manufactured by metal LPBF. This issue was considered using different gas- and plasma atomized AlSi10Mg powders. In addition to the particle properties, typical bulk material properties were measured. Furthermore, the in-situ density of the powder layers applied during the LPBF process were analyzed. A comparison of the properties of the final parts, using different particle size distributions and morphologies, has been conducted. Within the processing experiments, the laser scanning speed was varied in order to achieve the most efficient manufacturing process. It was found that the particle morphology has the biggest impact on the properties of the final parts. Plasma atomized powders could be processed with higher scanning speeds without a decrease in mechanical properties or part density. Moreover, they provide a significantly lower surface roughness.