Magnetically Retarded Recovery and Recrystallization in Cold Rolled Pure Copper

Abstract

The effects of magnetic field annealing on the micro-hardness and recrystallization microstructures in a cold-rolled pure copper sheet were studied. The results showed that the micro-hardness in the specimens subjected to magnetic field annealing were higher than those annealed without the magnetic field. There are significant differences in the microstructure during the recovery and early stage of recrystallization for the specimens annealed with and without the field. Magnetic annealing leads to the retarded recovery and delayed primary recrystallization. This effect is attributed to the decreasing of stored energy, which provides the driving force for the recovery and early stage of recrystallization being retarded by the application of a magnetic field in the cold-rolled pure copper sheets.