In-situ directed energy deposition of Al based low density steel for automotive applications.

Autor: Rott M; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Li Y; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Koukolíková M; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Šípová M; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Salvetr P; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Nový Z; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic., Wolf G; Fraunhofer UMSICHT, An der Maxhütte 1, 92,237, Sulzbach-Rosenberg, Germany., Džugan J; COMTES FHT a.s., Průmyslová 995, Dobřany, 334 41, Czech Republic. jan.dzugan@comtesfht.cz.; Department of Materials Science and Technology, West Bohemian University, Pilsen, Czech Republic. jan.dzugan@comtesfht.cz.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Dec 11; Vol. 13 (1), pp. 21911. Date of Electronic Publication: 2023 Dec 11.
DOI: 10.1038/s41598-023-49026-z
Abstrakt: This work deals with the fabrication of one low density steel by mixing AISI S2 tool steel and AlSi10Mg powders using powder-based directed energy deposition (P-DED) technique. Two approaches of mixing powders were compared-continuous mixing during the process (in-situ) and mixing the powder prior to the process (premixed). The P-DED sample was characterised by a variety of techniques such as optical microscopy, scanning electron microscopy, electron backscatter diffraction, X-ray diffraction, and hardness measurement. Our findings demonstrate the successful achievement of steel with a 8 wt. % AlSi10Mg addition when two dissimilar powders are premixed, resulting in approximately 12% reduction in the density of S2 steel. Optimizing the powder feed rate and the ratio of AlSi10Mg powder contribute to an improvement of printability, eliminating materials separation, leading to a homogenous deposited part. Compared to the in-situ mixing case, the premixed process within the current process window generates a more homogeneous microstructure consisting of three phases: Ferrite, Fe 3 Al and Fe 3 AlC carbide. Whereas, the in-situ sample exhibits only two phases Ferrite and Fe 3 Al. The hardness of the premixed sample is found to be slightly higher compared to the in-situ sample.
(© 2023. The Author(s).)
Databáze: MEDLINE
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