Additive manufacturing of CMCs with bimodal microstructure
Journal of Alloys and Compounds(2023)
Abstract
The present work deal with the fabrication of TiC-based composites with green Fe-based binder via additive manufacturing such as selective laser melting/laser fusion bed process. The as-built specimen exhibits a bimodal microstructure consisting of fine/ultrafine dendritic and coarser TiC phases. By adopting a novel multiple scan strategy, process defects such as cracks were eliminated by careful control of the melt pool temperature/cooling rates. Even though the mechanical properties may be improved, the anisotropic distribution of the dual phase leads to anisotropic distribution of hardness within the CMC surface.
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Key words
Titanium carbide-based composites,Additive manufacturing,Remelting,Selective laser melting
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