Effect of Processing Parameters on Relative Density and MechanicalProperties of Selective Laser Melted Biodegradable Pure Zinc

The pure zinc was manufactured by selective laser melting (SLM) technique,and the effect of laser power and scanning speed on the density and mechanical properties of the pure zinc was studied. The results show that with increasing laser power or decreasing scanning speed, the relative density and hardness of the SLM formed pure zinc increased, and the microstructure was columnar crystals with growth direction parallel to the building direction. The optimal parameters for the SLM formed pure zinc were the laser power of 100 W and scanning speed of 300 mm·s^-1; the relative density of the obtained sample reached 99.86%, the hardness was (44.7 ±1.2) HV, and the elastic modulus, elongation after fracture, tensile strength and yield strength were (48.6±2.4) GPa, (8.9±0.7)%, (95.5±3.3) MPa, (67.1±0.4) MPa, respectively.