Mid Sweden University

Multiple variants of the high-entropy alloy FeCrCoNiMoMnCB were manufactured with electron beam powder bed fusion (PBF-EB) and subsequently analytically evaluated to assess both the feasibility of the manufacturing method and the mechanical properties. The latter being examined by means of microstructural analysis and two indentation tests, namely nanoindentation and Vickers microhardness (HV01). Results indicate that parameters can be optimized to reliably achieve densities exceeding 99.5% with slight adjustments to the well-developed and established 316L setup. The alloys predominantly exhibited a desirable dual-phase microstructure comprising both lamellar and equiaxed subgrain-regions. Indentation tests revealed significant enhancements in hardness and elastic modulus over conventional alternatives, although the scope was too restrictive to permit comprehensive conclusions regarding mechanical properties.