Authors:
Erika Soares Barreto (Leibniz-Institute for Materials Engineering IWT, Germany),
Erika Soares Barreto (University of Bremen, Germany),
Maximilian Frey (Saarland University, Germany),
Stefan Kleszczynski (University Duisburg-Essen, Germany),
Ralf Busch (Saarland University, Germany),
Volker Uhlenwinkel (Leibniz-Institute for Materials Engineering IWT, Germany),
Volker Uhlenwinkel (University of Bremen, Germany),
Lutz Mädler (Leibniz-Institute for Materials Engineering IWT, Germany),
Lutz Mädler (University of Bremen, Germany),
Nils Ellendt (Leibniz-Institute for Materials Engineering IWT, Germany),
Nils Ellendt (University of Bremen, Germany)
Abstract:
Laser powder bed fusion of metals (PBF-LB|M) is advantageous for manufacturing bulk metallic glasses with size and geometrical freedom. However, the oxygen uptake along the production chain can negatively impact the generation of high-quality, amorphous parts. In this context, Cu-Ti-based alloys were gas-atomized and additively manufactured using commercial and high purity feedstocks. The oxygen absorption in each processing step was tracked and related to the amorphous phase formation and glass-forming ability (GFA) of alloys. Results show an increasing oxygen absorption, considerably influenced by the starting feedstock, especially for commercial purity. In high purity material, the most contribution is inherent from the powder oxygen content. Findings reveal the lack of influence of the oxygen content in the GFA. TEM analysis of commercial powder and PBF-LB|M sample show uniform and featureless micrographs, displaying the absence of oxygen-induced nucleation. The present contribution enhances the qualification and economic processability of amorphous metals by PBF-LB|M.
DOI:
https://doi.org/10.59499/WP225371915