Structural and Phase Transformations and Crystallographic Texture in Industrial Ti–6Al–4V Alloy with Globular Morphology of α-Phase Grains: Plate’s Transverse Section along Rolling Direction

The industrial Ti–6Al–4V alloy, obtained almost in the single-phase α state by the thermomechanical treatment including hot rolling, is studied by the methods of X-ray diffraction analysis, optical and transmission and scanning orientation electron microscopy. It is revealed that the layered fine-grained microstructure in the plate’s transverse section (TD) along the rolling direction (RD) is characterized both in the rolling plane (ND) and in the transverse section perpendicular to the RD by the texture selection and consistent distribution of globular α grains over the orientation Burgers relations and twinning orientations. The special crystallographic orientation of α grains and the mechanisms of generation of microtexture regions in the studied plate’s transverse section (TD) of the alloy correlate with the similar data established for the plate in the plane (ND) and in the transverse section. The results obtained in three mutually orthogonal sections of the plate agree with each other, determining the texture of the globular α phase.