Effects of energy density on the microstructure evolution of TiC/Ti6Al4V-ELI metal composite fabricated with laser metal deposition

This study investigated the microstructural evolution of Ti6Al4V-ELI reinforced with TiC, fabricated via in-situ laser metal deposition technique. The 3.85% volume fraction TiC/Ti6Al4V-ELI composite samples were at two different energy densities (ED). It was observed that reaction resulted in various morphologies (unmelted or partially melted, chain-shaped eutectic, granular primary and dendritic primary) TiC embedded beta grain boundary acicular alpha prime matrix. size structures decreases respect to ED. Additionally, hardness average 457.59 ± 39.73 455.08 18.03 HV0.3 for 96 102 J/mm2 ED respectively.