Effect of Energy Density on Tensile Properties of 316L Stainless Steel Sheet Formed by Selective Laser Melting
Author of the article:WANG Zeyin;YUE Wu;ZHANG Hao;ZHANG Yingmei;XUE Cheng;LI Jing
Author's Workplace：Department of Intelligent Control,Gansu Institute of Mechanical&Electrical Engineering,Tianshui 741000,China;School of Materials Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China;Department of Mechanical Engineering,Gansu Institute of Mechanical&Electrical Engineering,Tianshui 741000,China
Key Words：selective laser melting(SLM)forming 316L stainless steel laser density tensile properties microstructure evolution
Abstract：The 316L stainless steel sheets were prepared by selective laser melting(SLM)technique under different laser energy densities.The tensile properties and microstructure of the samples were compared and studied.The internal influence mechanism of the energy density on the tensile properties of the sample was analyzed,and the basis of selecting the energy density interval was clarified.The results show that the composite tensile properties of SLM molded samples are the best in the reasonable range of laser energy density.Outside the interval,the tensile strength increases and the elongation decreases with the increase of energy density.During the tensile process,the SLM structure near the fracture gradually evolves into a fibrous structure approximately parallel to the tensile direction.
