Comparative studies of the influence of 0.002-0.12 mass % hydrogenation on the structure and phase composition of the submicrocrystalline and coarse-grained Ti-6Al-4V alloys are performed. The evolution of the strain processes in the hydrogenated alloy is studied for both alloys upon tension at a temperature of 293 K depending on the hydrogen content and alloy state. It is established that the presence of hydrogen in the nanostructured Ti-6Al-4V alloy in the solid solution leads to a decrease of its yield stress and an increase of its tensile strength and total strain before failure. The possible reasons for the increased duration of the uniform strain stage and the effect of strain hardening of the alloy in the presence of hydrogen in the solid solution are discussed.
Comparative studies of the effect of hydrogenation on creep regularities of the titanium alloy of the Ti–Al–V system in the fine-grained (dav ≈ 7 μm) and ultrafine-grained (dav ≈ 0.3 μm) states are performed for the creep rates in the interval 10-7–10–5 s-1 at temperatures in the range 723–823 K. Hydrogenation of the alloy to 0.23 % is found to lead to a decrease in the steady creep rate and increase in the time to failure with simultaneous decrease in the value of deformation to failure. Possible reasons for the violation of the creep power law for the hydrogenated alloy are discussed.
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