期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：3
页码：032008
DOI：10.1088/1755-1315/233/3/032008
出版社：IOP Publishing
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.
