Abstract
Samples of a Ti3Al intermetallic compound have been subjected to cold plastic deformation with different logarithmic (true) strains e up to 10.3 using high-pressure torsion (HPT) under a pressure of 9 GPa. Formation of the disordered phase depending on the strain has been studied by X-ray diffraction and electron microscopy. At the degrees of deformation e = 8.7–10.3, a nanostructured disordered phase with a crystal size of mainly 5–15 nm is formed. Recovery of the ordered structure occurs in a temperature range of 400–600°C and is accompanied by the recrystallization of the deformed structure. In recrystallized grains of the ordered phase, antiphase domains appear in the form of oriented plates.
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