Annealing Texture of Nanostructured Steel-Based Nanocomposite

Abstract

In this research, the evolution of annealing texture in nanostructured steel-based nanocomposite fabricated via accumulative roll bonding (ARB) process was investigated. Textural evolution after post-annealing of ARB-processed samples was evaluated using x-ray diffraction. Average grain size of the sample before and after the post-annealing was 55 nm and 1.5 µm, and the microstructures were uniform. All the samples indicated a strong α-fiber and γ-fiber and a relatively weak ζ-fiber. Also, there were texture transitions in the α-fiber, ε-fiber, γ-fiber, η-fiber, and θ-fiber. In addition, for all the samples, the intensities of the rolling textures were higher than those of the shear textures. Moreover, there was a progressive increase in the fraction of high-angle grain boundaries with the increasing strain. Finally, with increasing number of ARB cycles, the intensities of rolling and shear textures changed, and no stable texture was formed.