Stress-associated changes in the magnetic properties of high strength steels

The stress-associated and the stress-induced changes in the magnetic properties of ferromagnetic materials have been identified and studied for more than a century. The results typically show multiple patterns which vary depending on the specimen under study and the mechanism by which the stress is applied. The measurements presented in the literature for iron, nickel, and steels show two unique magnetic features; the stress crossover and the bulging of the magnetization loop. The existence of these features in the magnetization measurements of different sets of high strength steel is studied. A statistical interpretation of the Preisach diagram is utilized to explain and model their existence. The modified DOK Preisach model effectively simulated the two features.