Influence of Hydrogenation on Evolution of Submicrocrystalline Structure of Ti-6Al-4V Alloy upon Exposure to Temperature and Stress

The influence of hydrogenation on the growth and size distribution of submicrocrystalline grain-subgrain structure elements of Ti-6Al-4V alloy is investigated by methods of transmission electron microscopy at temperatures 673-973 K. The kinetics is investigated and the energy of activation of growth of grain-subgrain alloy structure elements is determined in the processes of free annealing and stretching. The activation effect of deformation and hydrogen diffusion on migration of grain boundaries and growth of submicrocrystalline grain-subgrain structure elements is established.