Microstructure and mechanical properties of a novel (TiB2+TiC)/AlSi10Mg composite prepared by selective laser melting

The (TiB2+TiC)/AlSi10Mg composite powders with 1.5 wt% nano-TiB2 particles and nano-TiC were prepared by ball milling. Aluminum matrix composites (AMCs) reinforced TiB2 TiC fabricated via SLM optimal processing parameters. showed a very high ultimate tensile strength ∼552.4 MP excellent ductility ∼12%, which is 40.3% 166.7% higher than that of unreinforced AlSi10Mg, respectively. effects nanoparticles on the processability, microstructures, grain size, crystallographic texture systematically investigated to uncover its underlying strengthening mechanisms. results addition can obtain fine-equiaxed grains, facilitate microstructural homogeneity, consequently improved mechanical properties AlSi10Mg alloy. With nanoparticles, coarse columnar grains are completely transformed into equiaxed average size decreases from 12.1 μm μm.