Microstructure Evolution and Texture Characteristics of Pure Nickel N6 During Cold Rolling Process

A single-pass large-deformation rolling method was used to study the effect of cold rolling degree on the microstructure, microtextural evolution, and grain orientation during the cold rolling of pure nickel N6. The results show that the microstructure evolves from micro-bands to lamellar-bands with the increase of cold rolling reduction, and the fraction of coincidence site lattice boundaries always decreases. Starting from an initially low imposed strain (20% of the cold rolling reduction), the deformed microstructure is mainly composed of Goss, rotated Goss, P, and Brass orientations. When cold rolling reduction exceeds 50%, the shear textures appear and other textures remain but their intensities decrease. The strong shear stress on the surface of the rolled plate causes the normal cold-rolled texture dominated by Cu{112} < 111 > , S{123} < 634 > , Brass{011} < 211 > to rotate around the transverse direction to form a shear texture composed of shear4{112} < 110 > and {110}parallel to RD fiber textures.