THE EFFECTS OF STRESS ON INDUCTION, DIFFERENTIAL PERMEABILITY AND BARKHAUSEN COUNT IN A FERROMAGNET

The induction changes caused by the application of tensile and compressive stress cycles from points on the initial curve and major loop of a 0.2% carbon, 3% nickel steel have been measured using a pneumatic Stressing mechanism. The magnitudes of the irreversible induction changes are compared to the specimen iso-stress permeability and Barkhausen profiles. Results suggest that the complexity of the induction-stress process limits the suitability of either profile as a suitable 'response function' for the prediction of Subsequent stress-induced induction changes.