Authors:
Jan Johannsen (1), Sachin Abraham (1), Torben Dorbandt (1), Maximilian Kluge (1), Sebastian Matthes(2), Ma-ximilian Streinz (2)
1- Fraunhofer Research Institution for Additive Manufacturing Technologies IAPT, Hamburg, Germany
2- Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH, Jena, Germany
Abstract:
The impact of powder moisture on the quality of additively manufactured parts through laser beam powder bed fusion (PBF-LB/M) is investigated in this study. Pre-alloyed AlSi10Mg powder was artifi-cial moistened by aging in a climate chamber under regulated conditions of relative humidity and temperature. Various powder batches, ranging from 85 ppm to 1767 ppm water content, were pre-pared and processed by PBF-LB/M using diverse sets of process parameters. The printed speci-mens were examined for relative density, mechanical properties, and oxygen content.
The findings demonstrate a correlation between the moisture content in the powder and both me-chanical properties and oxygen content. Notably, a decline in the quality of printed AlSi10Mg speci-mens is observed when the moisture content exceeds 189 ppm water content in the powder. This study sheds light on the criticality of moisture in powder, providing valuable insights for ensuring the production of high-quality additively manufactured components.
DOI:
https://doi.org/10.59499/EP246275270
