On the Origin of γ -Fiber Recrystallization Textures in Deep Drawing Quality Steels

摘要

The γ fiber (ND//<111>) recrystallization texture evolves (at least on a meso-scale) by the preferred nucleation of γ oriented recrystallized grains from deformed grains/bands of similar orientations. Two physical factors determine the relative amount of the final γ texture: the relative proximity of deformed γ grains or bands and the ability of such deformed γ to form recrystallized grains. The first factor is basically determined by the deformation texture and may also be affected by the evolution of new high angle grain boundaries during the deformation process itself. The second factor may, on the other hand, involve the classical nucleation and/or limited/selective growth. Experimental evidences strongly suggest that the origin of the preferred γ nucleation exists in the framework of higher stored energy of γ oriented deformed grains - an event caused by the somewhat preferred formation of grain interior strain localizations in deformed γ.