Textural evolution of nano-grained 70/30 brass produced by accumulative roll-bonding

The accumulative roll-bonding (ARB) process was carried out on the 70/30 brass alloy sheet up to six cycles to obtain nano-grains. Texture evolution during ARB of 70/30 brass was investigated using X-ray diffraction (XRD). The results indicate that characteristic features of the rolling texture in the 70/30 brass become discernible in the first cycle with the appearance of the twinning component {2 5 5}〈5 1 1〉 (TC), Y {1 1 2}〈1 1 1〉, Goss {1 1 0}〈0 0 1〉, and Brass (0 1 1)〈2 1 1〉 components. During the first cycle, deformation twinning plays a major role in texture evolution, whereas after two cycles, twinning activity diminishes and shear bands dominantly lead to the formation of Goss and Brass, which remain as the major components in higher cycles. With increasing number of cycles, the overall texture intensity does not increase monotonously. After the second cycle, a drop occurs in texture intensity related to the shear strain incurred in the sheets while, after the third cycle, the overall intensity reaches its maximum value. After six cycles, texture intensity reduces slightly, which can be explained by nano-grain formation.