Experimental evaluation and theoretical analysis of the mechanical properties of ferromagnetic materials using the magnetic hysteresis properties

Abstract

The magnetic hysteresis properties of ferromagnetic materials have been investigated by experimental measurement and theoretical analysis for mechanical property evaluation. A modified Jiles-Atherton (JA) model is proposed considering both the frequency and microscopic dependence of the hysteresis properties. Dynamic hysteresis experiments of ferromagnetic specimens with different hardness values were performed to measure the hysteresis loops. Microscopic measurements of the specimens were performed to obtain the grain size and dislocation density, which were introduced into the dynamic JA model to calculate the theoretical hysteresis loops. The genetic algorithm was used to inverse the basic parameters of the JA model by matching the theoretical hysteresis loops with the experimentally measured hysteresis loops. Two magnetic parameters (the coercivity and power-law coefficient) were extracted from the hysteresis loops for mechanical property evaluation of ferromagnetic materials. It was found that the proposed JA model can be used for theoretical analysis of the influence of the microstructure on the magnetic hysteresis properties, and the coercivity and power-law coefficient can be used for mechanical property evaluation of ferromagnetic specimens. The research reveals the influence of microstructure on the mechanical properties (hardness) and magnetic characteristic parameters of ferromagnetic materials.