Selective laser melting of low-alloyed titanium based alloy with a large solidification range
V. A. Bautin, Vladislav Zadorozhnyy, Artem Korol, В. Е. Баженов, A. S. Shinkarev, Stanislav V. Chernyshikhin, Dmitry Moskovskikh, М. Е. Самошина, А. М. Хорт
Abstract
In this work, thermodynamic calculations are carried out using the Thermo-Calc software for α + β Type Ti–Fe–Cu–Sn alloy. Powders from this alloy were obtained by plasma sputtering for subsequent 3D printing of experimental samples from them. The effect of various selective laser melting (SLM) parameters on porosity and hot cracking susceptibility has been studied, and the electrochemical characteristics of the alloy have also been studied. The optimal technological regime for the manufacture of samples by the SLM method was determined. It has been established that to obtain relatively dense samples without cracks, regimes with volumetric energy density E v = 250–300 J/mm 3 are required. A relationship has been established with the formation of a nonequilibrium Ti 2 Cu phase and a change in the electrochemical behavior of the Ti 94 Fe 1 Cu 1 Sn 4 alloy. Directions for further research are determined and recommendations are given.