Irregular or smooth grain boundaries evolved after secondary recyrstallization of Fe-3% Si steel

Abstract

Irregular or smooth grain boundaries after secondary recrystallization are formed depending on whether interpass aging is adopted or not during cold rolling of Fe-3% Si steel. Interpass aging induces the primary texture of high intensity of {111}〈112〉 and {411}〈148〉 orientations, which have a Σ9 relation with respect to the Goss orientation and therefore are favorable for Goss grains to grow by solid-state wetting. Under this condition Goss grains come in contact with each other by wetting without leaving any small grains in between, resulting in irregular boundaries. © 2012 The Japan Institute of Metals.