X-Ray Analysis of α and ω – Phases of Ti, Subjected to High-Pressure Torsion
This paper presents the results of experimental X-ray structural analyses of both the evolution structure and the crystallographic one in the volume of Ti samples, subjected to the Severe Plastic Deformation (SPD), realized by torsion under high pressure equal to 6 GPa at temperature 298 K. The investigations have been carried out on the disk-shaped samples with the radius of 20 mm in an initial state (the as-received state) and in the states after 0.1, 0.5, 1 and 5 rotations by High-Pressure Torsion (HPT). In the result the evolution mechanisms of the general X-ray patterns, the volume fraction of phases, the character of preferred orientations, as well as the activity of various slip and twinning systems in α- and ω-phases, depending on the SPD degree have been found out. The received results allow explaining and forecasting the behavior of nanostructured Ti, considering the parameters of its microstructure and crystallographic texture.
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
V. D. Sitdikov et al., "X-Ray Analysis of α and ω – Phases of Ti, Subjected to High-Pressure Torsion", Materials Science Forum, Vols. 667-669, pp. 187-192, 2011