Effect of linear energy density on pores of 316L stainless steel by selective laser melting

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Wang, Wen-Hao^1 ; Liu, Xin-Yu^1

Department of Mechanical Engineering, Anhui Technical College of Mechanical and Electrical Engineering, Wuhu Anhui

241000, China^1

关键词: 316 L stainless steel;    Laser power;    Linear energy;    Macro-cracks;    Oxide inclusion;    Process parameters;    Scanning speed;    Synthetic parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/3/032008/pdf
DOI  :  10.1088/1755-1315/233/3/032008

来源: IOP

【 摘 要 】

The defects of forming parts with different process parameters (laser power, scanning speed and scanning distance) were studied by microscope, including air bubble, pore, micro-crack and macro-crack. The micro-structure and composition of the defects were studied by means of SEM and EDS. The results showed that the pore mainly included circular air pore, irregular process pore and oxide inclusion. Linear energy density(E = P/v)was introduced as synthetic parameter. The pore decreased gradually with increasing linear energy density.