Abstract
This paper aims to research the influence of the addition of boron carbide ceramic particle enhancer on the grain shape and microstructure of commercially pure titanium (CP-Ti) during laser additive manufacturing process. It is found that during SLM process of B4C/CP-Ti, the reinforced particles B4C react with CP-Ti to produce prismatic TiB and whisker-like TiB and granular TiC. The in-situ synthesized TiC and TiB extremely improve the microhardness of the SLM-processed Ti composite from 213.9 to 513 HV0.5, but drastically reduced its plasticity in comparison to CP-Ti, which is of great significance for further popularization of titanium matrix composites.
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