Recovery and recrystallization in nickel alloy–based tapes with various easy magnetization directions upon annealing in a high magnetic field

Abstract

Ni_48.8Fe_51.2 and Ni₇₀Co₃₀ alloys are subjected to cold rolling at a reduction of 98.8–99.0% and are annealed in a dc magnetic field of up to 29 T and without a field at various temperatures. The effect of a magnetic field on the structure and the crystal texture is studied. The application of a magnetic field is found to retard recovery processes and the early stages of recrystallization. At the stage of grain growth, the number of orientations with an easy magnetization direction increases and the grain size increases provided that the easy magnetization direction coincides with the main texture of the material. If the easy magnetization direction does not coincide with the texture, the grain growth in a field is decelerated and the texture sharpness decreases.