Magnetostrictive Study of High Strength Steels With Respect to Angle From Rolling Direction

Many of the commonly used high strength steels have small amounts of magnetostriction. This magnetostriction can be utilized, for example to measure the torque on a rotating shaft. Previous studies on the magnetostriction in high strength steels have ignored the internal anisotropies due to previous material handling. This paper presents data taken on rods of a high strength steel that have been machined parallel, perpendicular and 45^° to the rolling direction. Magnetization, magnetostriction, susceptibility, and stress-strain curves have been measured under various stresses and fields. In general, the parallel cylinders showed altered B-H, susceptibility, and magnetostriction curves compared to the other two orientations. These measurements will be incorporated into a future Vector Preisach model allowing detailed predictions of the magnetic state after stress and field changes.