Effect of Laser Power and Scanning Speed on Microstructure and Performance of TC4 Alloy Formed by Selective Laser Melting

Titanium alloy possess outstanding comprehensive properties, and they are important metal structural materials which have been widely used in aerospace industry, chemical industry, marine engineering and other fields. TC4 alloy was formed by selective laser melting (SLM) technology. The effects of laser power and scanning speed on the mechanical properties and microstructure of the alloys were analyzed by tensile testing machine and metallographic microscope. The results showed that the change of scanning speed and laser power showed significant effects on the mechanical properties and microstructure of the TC4 alloy by SLM. The optimal laser power and scanning speed of TC4 alloy formed by SLM are 300 W and 1.5 m/s, respectively. Under these conditions, the tensile strength and elongation of the alloy are 1282.23 MPa and 8.89%, respectively.