Influence of the temperature of high pressure torsion deformation on the recrystallization kinetics of iron with a submicrocrystalline structure

The kinetics of recrystallization of pure iron deformed by high pressure torsion at 20 and 250°C has been studied in the course of annealing at 450°C. The change in grain size upon annealing at 450°C does not obey the law of normal grain growth, either in iron with an SMC structure formed at 20°C or in iron with a dynamically recrystallized structure formed at 250°C. This is because new thermally activated recrystallization centers appear upon annealing. The study has also established the influence of deformation temperature on the annealing texture. Similarly, after deformation at 20°C, a sharper texture is formed with a predominance of two components {110} 111 and {110} 001, and after deformation at 250°C, with a predominance of three components {110} 111, {110} 001 and {112} 111, is formed.