THE CHANGES OF GRAIN-BOUNDARY-CHARACTER-DISTRIBUTION DURING THE SECONDARY RECRYSTALLIZATION OF ELECTRICAL STEEL

A new model of development of the Goss ({110}[001]) texture during the process of the secondary recrystallization of electrical steels, was proposed based on the assumption that the high-energy boundary has a h igh mobility. This assumption is tested by a direct orientation measur ement using Electron Back Scattering Patterns (EBSP). It is demonstrat ed that the frequency of the high-energy boundary decreases during the normal grain growth of the matrix grains. This result suggests that h igh-energy boundaries move quickly and disappear during the grain grow th process. Therefore, this result may be used to support the assumpti on of a high mobility for the high-energy boundary. We conclude that t he role of the high-energy boundary is important in the late stage of secondary recrystallization when large Goss grains consume matrix grai ns, and that the CSL boundaries do not play a positive role in the sec ondary recrystallization. (C) 1998 Acta Metallurgica Inc.