Laser-based Powder Bed Fusion of dispersion strengthened CoCrNi by ex-situ addition of TiN

In this study, metal matrix composites (MMC) of a CoCrNi medium entropy alloy (MEA) reinforced with titanium nitride (TiN) nano-sized particles were designed for production by laser-based powder bed fusion (LB-PBF). Two different additions, 0.5 wt% and 5 TiN nano- sized particles, mixed using tumbling ball milling, respectively. The results suggest that although the morphology is not significantly affected addition, processability CoCrNi-5 worse than CoCrNi-0.5 TiN. hardness CoCrNi, originally 278 HV, enhanced addition 0.5% 5% to 309 HV 357 This hardening mainly due presence reinforcement in matrix. work presented here shows promising MMC based on MEAs LB-PBF, as well beneficial effect phase mechanical properties MEAs.