Microstructure Refinement and Texture Evolution of Titanium by Friction Roll Surface Processing

Abstract

Friction roll surface processing (FRSP), as a novel severe plastic deformation technique, has been put forward and experimentally investigated. Commercial pure titanium sheets were subjected to FRSP and subsequent annealing. An extremely large strain was imposed on the surface layer of the sheet. Consequently, a uniform ultrafine-grained microstructure with a grain size of approximately 80 nm and a deformation texture were obtained in the surface layer. The FRSP texture was found to be strongly related to the processing direction. The evolution of texture during annealing was also investigated. The texture analysis revealed that new preferred orientations could be developed during FRSP.