The Role of Transformation Textures on the Development of Cold Rolled and Annealing Textures in Ultra-Low Carbon Steels

摘要

1. Cold rolling textures were similar regardless of chemical composition and/or TMP path. Because of an initially strong {111}<110> hot band texture, the stable end components in the alpha- and gamma-fibers are {445}<110> and {111}<110>, respectively. 2. The final as-annealed texture observed can be explained in terms of a combination of "Oriented Nucleation" and "Selective Growth" theories. 3. The influence of both the starting hot band microstructure and hot band texture is evident on the resulting annealing texture. The orientation {111}<112> develops as the main component in the gamma fiber only when the material is hot deformed in the pancake region of the austenite. It is suggested that the reason for this is related to the stored energy of cold work induced during cold rolling, which in turn depends on the initial hot band texture. 4. Detailed TEM analysis suggests that under the experimental conditions used, these IF steels do not reach a state of complete recrystallization as defined by the classical laws of recrystallization, i. e., where static recrystallization is defined by a very low dislocation density.