Effect of High Magnetic Field Annealing on Microstructure and Texture at the Initial Stage of Recrystallization in a Cold-Rolled Interstitial-Free Steel

Abstract

(mass%): 0.0023C, 0.056Ti, 0.014Si, 0.16Mn, 0.011P, 0.0064S, 0.052Al, 0.0018N. Specimens with the dimensions of 20 mm � 10 mm � 1 mm were respectively subjected to isothermal annealing at 650 � C for different time (0, 10 and 30 min) in a furnace installed in a cryocooler-cooled superconducting magnet at a heating rate of 5 � C/min, with and without a 12-tesla magnetic field, and then cooled in the furnace. During the magnetic field annealing, a magnetic field was kept being applied in the whole heating and cooling processes. The specimens were placed at the center of the applied field with their rolling direction (RD) paralleling to the magnetic field direction (MD). The experimental setup is schematically shown in Fig. 1. Microstructures of longitudinal sections of the specimens were examined by orientation imaging microscopy (OIM). In the maps, the recrystallized grains are highlighted (dark grains). The scan was carried out over the area of 1191 � 878 measuring points with a 0.07 mm step size, and the corresponding ODFs were calculated using the Channel 5