Effect of annealing treatment on magnetic texture of cold rolled ULC steel

Abstract

Anisotropic behaviors of cold rolled and annealed ULC steels are evaluated by orientation imaging microscopy (OIM) and magnetic Barkhausen emission (MBE) techniques. The MBE voltage is found higher along RD than TD, indicating the presence of favorable magnetic easy axis along RD for both 50 and 80% cold rolled steels. The recovery occurred at low temperature (T < 500 degree C) annealing causes a higher anisotropy coefficient (‘k’) for 50% than 80% CR steel, while at high temperature (T > 500 degree C) annealing leads to an abrupt drop of ‘k’ value for both cold rolled steels. Furthermore, the kernel average misorientation map, obtained from OIM, decreases with increasing annealing temperatures.