Deformation and annealing textures of rolled nickel single crystals

Abstract

Textural and structural analysis is conducted on nickel single crystals of unstable orientation in a compression deformed (ε=83%) and annealed state. The formation of different deformation textures (DT) on opposite surfaces of compressed crystals is established. The relief and band structure corresponds to two-component DT {110} 〈112〉, observed in the compression plane. Annealing (573°K) leads to the appearance of recrystallization grains on the two component DT side {110} 〈112〉. Orientationally, the first recrystallization grains correspond to the intersection of the peripheral portions of the texture maxima associated with both components of DT. On the side with DT {123} 〈212〉, indications of recrystallization were not observed. Application of the texture method with defocus allowed the comparison of the state of the lattice in the regions of the crystal having different orientations. The experimentally observed inhomogeneity of the development of the structure for primary recrystallization is explained by the inhomogeneity of the deformed structure and by orientational factors.