Speaker
Description
Orientation Selection and Stored Energy Effects During the Incipient Stage of Recrystallization in Low-Carbon Steels
Leo Kestens
Department of Materials Science and Engineering, Faculty of Engineering, Ghent University, Belgium
Abstract
In the literature on texture formation during recrystallization of cold rolled low-carbon steels the difference between low and high-stored energy nucleation is well established. In a series of experiments added with model simulations the precise nature of orientation selection during the early stages of recrystallizations is revealed. A comprehensive and unified interpretation is presented that encompasses all the findings in one single theoretical concept. The incipient stage of recrystallization (aka the nucleation stage) is controlled by growth selection on the substructural scale, benefitting from short range misorientation gradients, reminiscent of stored energy of plastic deformation and enhancing the local boundary mobility. These concepts have been obtained through high-resolution EBSD scans on deformed structures of IF steels after rolling and torsion deformation, for various deformation temperatures.
