The structure of the alloy Ti - (20-30) Nb - 5Zr after smelting and homogenizing annealing

Obtaining a Wire of Biocompatible Superelastic Alloy Ti–28Nb–5Zr

“…A homogeneous structure was noted at all stages. Large dendrites observed in ingots after smelting (Figures 1 and 2) are consistent with the previous study, where the structure of Ti-Nb-Zr alloys had zones along the cross-section of the ingot from dendrites to large grains [35].…”

“…The temperature range of homogenizing annealing was chosen, assuming that at 900 • C the processes of dendrite dissolution and recrystallization will begin, and after annealing at a temperature of 1000 • C a completely recrystallized β-phase will form [20,28,35]. It was noted that higher-temperature annealing leads to a sharp increase in grains to millimeter sizes, the fragility of the ingot, which will negatively affect the deformability of the ingots during further rolling.…”

“…The selected annealing mode led to the uniform dissolution of dendrites (Figures 3 and 4), according to [35] contributing to the production of grains 200-400 microns in size, which is quite suitable for further plastic deformation of the melted ingots.…”