مشخصات پژوهش

In the current study, 3D printed parts made of Ti6Al4V material were prepared utilizing SLM (Selective Laser Melting) process in two horizontal (X) and vertical (Z) directions. By performing heat treatment at 900 °C, its effect on microstructure, porosity characteristics and especially on mechanical properties was investigated. Microstructural evolutions were carried out with detailed investigations by light and electron microscopes (FE-SEM), radiography and Archimedes test. Investigations of phase transformations were done by XRD test and their effect on mechanical properties such as tensile behavior and hardness was evaluated. The results indicate that heat treatment had remarkably favorable effect on microstructural characteristics and mechanical properties of Ti6Al4V 3D printed parts. In such a way that the mechanical properties, especially the tensile and yield strength as well as the ductility of heat treated parts increased significantly compared with that of as received ones. Also, the manner of these changes in the specimens oriented in the X and Z directions showed significant differences, which was depicted using microstructural images and radiography.