Influence of Activated Dislocations on Recrystallization near Grain Boundaries in Coarse-Grained Fe–30Cr Alloy

Abstract

Compressive deformation was applied to a coarse-grained Fe-30Cr alloy polycrystal at room temperature. Multiple slip occurred close to a grain boundary. Through the investigation of the activated slip systems, it was known that the dislocations which piled up against the grain boundary were mixed ones with a relatively large screw component. After annealing, many recrystallized grains (RGs) formed close to the original grain boundary. The orientations of more than 80% of the RGs were related to the deformed matrices by rotations about (110) axes normal to each common cross slip plane of the activated dislocations. Strain induced boundary migration did not occur. The preferred orientation of RGs was discussed in connection with the activity of slip systems.