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Selective laser melting of boron carbide particles coated by a cobalt-based metal layer

Abstract : Selective laser melting (SLM) is an additive manufacturing technology widely applied for direct fabrication of functional parts from metal powders. In this paper, the feasibility of the fabrication of three-dimensional cermet objects by SLM using 5-35 mu m boron carbide particles surrounded by similar to 2 mu m cobalt-based layers was explored. Microstructure, composition, porosity, compressive strength and microhardness of the fabricated object were investigated. A highly porous (37%) homogeneous structure containing grains of boron carbides with 2900-3200 HV hardness embedded in the cobalt-based matrix was obtained. It was also found that new phases were formed during SLM as a result of the interaction of B4C with the cobalt-based matrix.
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https://hal-emse.ccsd.cnrs.fr/emse-01353579
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Soumis le : lundi 13 septembre 2021 - 15:03:07
Dernière modification le : lundi 13 septembre 2021 - 16:12:00

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A. Davydova, A. Domashenkov, A Sova, Igor Movtchan, Philippe Bertrand, et al.. Selective laser melting of boron carbide particles coated by a cobalt-based metal layer. Journal of Materials Processing Technology, Elsevier, 2016, 229, pp.361-366. ⟨10.1016/j.jmatprotec.2015.09.033⟩. ⟨emse-01353579⟩

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