Abstract
The effect of deformation temperature on the grain size in titanium VT1-0 and double-phase titanium alloy VT6 is studied. The temperature-and-rate modes of formation of submicrocrystalline structure are determined. The mechanical behavior and the evolution of the microstructure in the course of warm severe deformation is investigated by means of successive compression of specimens over three orthogonal directions at a temperature of 400°C for titanium and 550°C for alloy VT6. The mechanisms of grain refinement in severe deformation are determined. It is shown that they differ depending on the composition of the alloy. The method of “abc”-deformation is used for fabricating large-mass preforms from titanium VT1-0 and alloy VT6 with submicrocrystalline structure; large-size sheets are produced from alloy VT6.
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