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Investigation on the influence of powder humidity in Laser Powder Bed Fusion (LPBF)

  • In the Laser Powder Bed Fusion (LPBF) process, parts are built out of metal powder material by exposure of a laser beam. During handling operations of the powder material, several influencing factors can affect the properties of the powder material and therefore directly influence the processability during manufacturing. Contamination by moisture due to handling operations is one of the most critical aspects of powder quality. In order to investigate the influences of powder humidity on LPBF processing, four materials (AlSi10Mg, Ti6Al4V, 316L and IN718) are chosen for this study. The powder material is artificially humidified, subsequently characterized, manufactured into cubic samples in a miniaturized process chamber and analyzed for their relative density. The results indicate that the processability and reproducibility of parts made of AlSi10Mg and Ti6Al4V are susceptible to humidity, while IN718 and 316L are barely influenced.

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Author:Christian Weiss, Jonas Heslenfeld, Jasmin Kathrin Saewe, Sebastian Bremen, Constantin Leon Häfner
Parent Title (English):Procedia CIRP
Place of publication:Amsterdam
Document Type:Conference Proceeding
Year of Completion:2022
Date of the Publication (Server):2022/09/12
Tag:Additive Manufacturing; Humidity; LPBF; Powder Material
First Page:115
Last Page:120
Teil der Sonderausgabe: 12th CIRP Conference on Photonic Technologies [LANE 2022]
Institutes:FH Aachen / Fachbereich Maschinenbau und Mechatronik
collections:Open Access
Verlag / Elsevier
Licence (German):License LogoCreative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung