Mechanical properties of a solid-phase composition from VT6 titanium alloy obtained under conditions of low temperature superplasticity

The problem of obtaining the high-quality solid-phase compound (SPhC) of bulk nanostructured titanium alloy VT6 at temperatures of 800–600°C under conditions of low-temperature superplasticity (SP) is researched in this paper. The factors that determine the quality of the SPhC are considered: the structure of the material, the welding conditions (temperature, degree of deformation), geometric shape of the joined blanks. It is experimentally proven that at pressure welding in the temperature range of 800–700°C with a degree of deformation within 5%, it is possible to obtain high-quality SPhC. With an increase in the deformation degree up to 15%, the influence of the temperature-time factor increases and the strength characteristics of the welded specimens decrease. The possibility of superplastic flow localization in the joint zone by changing the geometric shape of the blanks is shown. Complex design and physical experiments on the feasibility of pressure welding of blanks from VT6 alloy at temperatures of 650°C and 600°C using the phenomenon of low-temperature SP are performed. © 2021 Informa UK Limited, trading as Taylor & Francis Group.