Recrystallization textures of powder metallurgically prepared pure Ni, Ni–W and Ni–Mo alloy tapes for use as substrates for coated superconductors

Development of cube texture after heavy cold deformation and annealing has been studied in powder metallurgically prepared pure Ni, Ni–5at.%Mo and Ni–5at.%W alloys for use as substrates for coated superconductor applications. Two grades of Ni powder with different purities have been used to prepare the initial materials. Addition of W and Mo is found to be beneficial in increasing the volume fraction of the cube component, irrespective of the purity of the Ni powder used. W particularly increases the volume fraction of the cube component in Ni by decreasing the volume fraction of the RD (rolling direction)-rotated cube grains. Studies on partially recrystallized samples indicate that in contrast to pure Ni, in Ni–5at.%W alloy the recrystallized grains are mostly cube oriented right from the beginning of recrystallization.