Microstructure and corrosion properties of PBF-LB produced carbide nanoparticles additivated AlSi10Mg parts
İhsan Murat Kuşoğlu, Pascal Vieth, Steffen Heiland, Florian Huber, Arne Lüddecke, Anna Rosa Ziefuß, Arno Kwade, Michael Schmidt, Mirko Schaper, Stephan Barcikowski, Guido Grundmeier
Abstract
Due to its good corrosion resistance, demand for PBF-LB-produced Al alloys increases rapidly in industrial applications. However, recent studies showed that corrosion resistance critically depends on the microstructure of as-built Al parts. This study showed that nano-additivation with carbides (SiC and TiC) could gradually tune the microstructure of as-built AlSi10Mg parts, which directly affects their corrosion resistance. In this study, the microstructure of the as-built and heat-treated parts are examined by SEM-EBSD, and corrosion properties are measured with a potentiodynamic polarization test. Furthermore, we found that both SiC and TiC nanoparticles acted as a grain refiner, reduced columnar grain formations in the AlSi10Mg matrix, and improved corrosion properties after stress-relief heat treatment of as-built parts with TiC outperforming SiC.