The orientation analysis of the shear bands in cold-rolled ultra-low carbon steel using the EBSD technique

摘要

The morphologies and crystal orientations of the shear bands in cold-rolled ultra-low carbon steel were characterized by using TEM and EBSD technique. One important finding is that some shear bands develop in a orientated grains in addition to γ and rotated Goss orientated grains. Shear bands originate at grain boundaries and spread to ingrains. The shear bands in a and γ grains have {111} <112> and (110) [001] orientation, respectively, which conform to the preferential orientation of the recrystallization grains. It is believed that at the margin and in the interior of the shear bands in a grains are ideal recrystallization nucleation sites because there are large orientation gradient, strain gradient and lattice curvature in these regions. The present investigation provides an experiment evidence for clarifying the nucleation and crystal orientation of recrystallization grains during annealing.