Cube Texture Formation in Fe–50 % Ni Thin Tapes Under Annealing in DC High Magnetic Field

Abstract

The main purpose of the work is to study the recovery and recrystallization processes in cold-rolled tapes of the Ni48.8Fe51.2 alloy subjected annealing under high magnetic fields up to 20T. In the course of primary recrystallization without magnetic field, in the tapes made of this alloy, there forms a sufficiently sharp cube texture, which makes it possible to use these tapes for epitaxial deposition on them of high-temperature superconductors (HTS). In the work presented, the rolled tapes are used as a model material for investigation of structure transformations upon a new treatment mode—annealing in high direct current magnetic field. Preliminary annealings in magnetic field and, for comparison, without it were performed at temperatures both above and below the Curie temperature and, at the same time, the onset temperature of primary recrystallization. It is shown that as a result of the final annealing without magnetic field at an elevated temperature, which provides the primary recrystallization and normal grain growth, in the recrystallization texture of tapes that underwent a preliminary annealing at the temperature below the Curie point, there is observed a noticeable increase of the volume fraction of grains with the easy magnetization axis . Moreover, the retardation of recovery processes during magnetic annealing was found.