Thermal Effect on the Structural and Phase Condition and Mechanical Properties of Ultrafine-Grained Titanium Alloy VT16 in the Temperature Range of 293 – 923 K

Abstract

The effect of pre-recrystallization annealing on the evolution of the structural and phase state and the deformation and fracture behavior of ultrafine-grained titanium alloy VT16 obtained by pressing with change of the deformation axis and gradual lowering of the temperature within 1023 – 723 K is studied. It is shown that the process of pre-recrystallization annealing is accompanied by retrogression of the strained structure, which lowers the strength characteristics, and by a β → α phase transformation and redistribution of the alloying elements, which keep the strength properties at a high level.