Texture Development of ARB-Processed Steel-Based Nanocomposite

Abstract

In this study, the evolution of deformation texture in steel-based nanocomposite fabricated via accumulative roll bonding (ARB) process was investigated. Textural evolution during the ARB process was evaluated using x-ray diffraction. It was found that with increasing number of ARB cycles, first, intensity of α-fiber, γ-fiber, and θ-fiber decreased and then increased, while ζ-fiber exhibited the opposite trend compared to these fibers. Also, there were texture transitions in ε-fiber and η-fiber. It was realized that with increasing the number of ARB cycles, volume fraction of low-angle grain boundary decreased and the fraction of high-angle grain boundary increased. In addition, shear texture was predominant after first cycle, while for other samples, rolling texture was dominant. When recrystallization occurred, the intensity of ζ-fiber increased, the intensity of α-fiber and γ-fiber decreased, and the intensity of {011}〈100〉 orientation in ε-fiber and η-fiber remarkably increased. Indeed, the transition from rolling texture to shear texture was a sign of occurrence of discontinuous recrystallization after the first ARB cycle. Moreover, in the one-cycle sample, nucleation of discontinuous recrystallization had occurred. Finally, with increasing the number of cycles, the intensity of rolling texture increased and the intensity of shear texture decreased.