Deformation Feature of Goss Grains in Fe-3%Si Steel Focused on Stored Energy after Cold Rolling

Abstract

In an effort to explain the selective Goss abnormal grain growth in Fe-3%Si steel based on the sub-boundary enhanced solid-state wetting, we investigated why sub-boundaries are formed exclusively in Goss grains after primary recrystallization. In order for Goss grains to have sub-boundaries exclusively, they should undergo only recovery without recrystallization whereas other grains undergo recrystallization. For this, Goss grains should have the lowest stored energy after cold rolling. Goss and rotated cube orientations have the same and the lowest Taylor factor among the grains formed after cold rolling, implying that they should have the lowest stored energy. The stored energy between Goss and rotated cube orientations was compared by the crystal plasticity finite element calculation, which showed that the stored energy of the Goss orientation was lower than that of the rotated cube orientation after plane strain deformation.