Reasons for the Difference of the Fields of the Peaks of the Reversible and Differential Magnetic Permeability in Deformed Low-Carbon Steels

This paper considers the reasons for the differences in the position of the peaks of reversible magnetic permeability in plastically deformed low-carbon steels and of the corresponding peaks of differential magnetic permeability. The discussion deals with two of three peaks caused by, correspondingly, reversible and irreversible shifts of 90° domain walls. These peaks are directly connected with the residual stresses and can serve for their nondestructive control.