FORMATION OF SUBMICROCRYSTALLINE STRUCTURE IN THE TITANIUM-ALLOY VT8 AND ITS INFLUENCE ON MECHANICAL-PROPERTIES

It is shown that the formation of microstructure with grain size up to 0.06 mum may occur during the course of plastic deformation of the Ti -6Al-3.2Mo (alpha + beta)-alloy with the initial coarse-grained lamell ar structure. The formation of submicrocrystalline structure results f rom the development of dynamic recrystallization concurrent with the p rocess of spheroidization. The temperature of superplastic deformation significantly decreases while strength characteristics at room temper ature sharply increase in the alloy with such a microstructure.