Effect of Processing Parameters on Selective Laser Melting of TA15 Titanium Alloy

Author of the article:ZHANG Dan, WANG Meng, LI Chuangchuang

Author's Workplace：State Key Laboratory of Solidification Processing, MIIT Key Laboratory of High Performance Metal Additive Manufacture and Innovative Design, Northwestern Polytechnical University

Key Words： selective laser melting; TA15 titanium alloy; processing parameter; relative density

Abstract：TA15 titanium alloy were produced by additive manufacturing of selective leaser melting technique. The results show that with the increase of laser power, laser scanning rate and scanning channel spacing, the density of TA15 samples increases first and then decreases. The laser energy density acting on the powder bed is a good criterion for the process parameters. At low energy density, the powder can't completely melt, and irregular mal-fusion pores usually appear. At high energy density, circular pores appear due to gas precipitation and entrapment. At a medium energy density of 60~127 J/mm 3 , TA15 samples with a density not less than 99.15% can be obtained.