Nondestructive Characterization of Titanium Alloy Lattice Materials Prepared by Laser Selective Melting
LIU Xiaotong1 , WANG Bingyang1 , DAI Ning2 , WU Liming2 , WANG Jingzhao1 , HU Quandong1 , LI Huaixue1
(1. AVIC Manufacturing Technology Institute, Beijing 100024, China； 2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics，Nanjing 210016, China)
Abstract：The titanium alloy lattice with BCC and DOD structure is prepared by laser selective melting. Micro– CT is used to scan and 3D reconstruct the titanium alloy lattice materials with these two kinds of structures. Clear internal structure can be seen in these lattices and a few round and oval defects can be found. BCC and DOD cells are arranged neatly and periodically with no slag, collapse or rod bending. Through comparison of CATIA model and 3D reconstruction data of lattice structures, it is found that the alloy lattice is bended. In addition, the surface roughness of BCC and DOD metal lattices is measured and calculated using confocal microscope based on Micro–CT image. The results show that Micro–CT has significant application value in the characterization of the internal structure, defects, preparation errors and roughness testing of titanium alloy lattice materials.
2021, 
