Authors:
Christian Weck (Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Germany),
Andrea Schinderling (Universität Bremen, Germany)
Abstract:
The flowability of metal powders is crucial for all powder bed-based Additive Manufacturing processes. To ensure a defined and reproducible flowability of powders and therefore a robust AM process, a good understanding of the influence of the air humidity on the flowability is important. The flowability of powders is a result of the complex interaction of intrinsic powder properties (e.g. particle size distribution, particle morphology, chemical composition) and the water content.To investigate the influence of the particle size as well as the chemical composition, four different metal powders (316L, Ti6Al4V, AlSi10Mg) were selected. The powders were exposed to different air humidifies between 30% and 80% for different times between 1 hour and 4 hours. All powders were characterized regarding their particle size and morpholopy, their flowability and their water content. Based on the results the influence of the exposition parameters and the powder properties on the flowability was investigated.
DOI:
https://doi.org/10.59499/WP225372037