Microstructure and Properties of TiCp/GH3536 prepared by Selective Laser Melting

Abstract

In this paper, TiCp/GH3536 composites were prepared by selective laser melting technology. The effects of volume energy density (VED) on the microstructure, densification, mechanical properties and thermophysical properties of TiCp/GH3536 composites were studied. The results show that the pores and nano TiC clusters in TiCp/GH3536 composites gradually disappear with the increase of VED. The interface between TiC ceramic phase and GH3536 matrix was well bonded, which was a non coherent interface, and there was no interface reactant. The optimal VED of SLM is 96.3 J/mm3, and the specific laser power, scanning rate, scanning spacing and powder layer thickness were 260W, 900 mm/s, 0.1mm and 0.03mm, respectively. The highest density of the composite is 99.96%; The maximum tensile strength and yield strength were 1137.2MPa and 900.6MPa, respectively.