Влияние охлаждения подложки на микроструктуру и фазовый состав изделий из титанового сплава Ti-6Al-4V, полученных методами аддитивных технологий

Abstract

The microstructure, phase composition, and parameters of the -Ti based solid solution in the Ti-6Al-4V alloy obtained by 3D printing without cooling and with water cooling of the titanium substrate were studied by the methods of X-ray diffraction analysis, transmission diffraction and scanning electron microscopy, and optical metallography. It was found that the use of water cooling of the substrate leads to a decrease of the hereditary  grains sizes, an increase in the volume fraction of the  phase, a decrease in the volume fraction of the  phase and the total mean square displacement of atoms in the -Ti crystal lattice, as well as an increase in the elastic macrostrain of the samples.