The effect of temperature on the average volume of Barkhausen jump on Q235 carbon steel

On the basis of the average volume of Barkhausen jump (AVBJ) v¯ generated by irreversible displacement of magnetic domain wall under the effect of the incentive magnetic field on ferromagnetic materials, the functional relationship between saturation magnetization Ms and temperature T is employed in this paper to deduce the explicit mathematical expression among AVBJ v¯, stress σ, incentive magnetic field H and temperature T. Then the change law between AVBJ v¯ and temperature T is researched according to the mathematical expression. Moreover, the tensile and compressive stress experiments are carried out on Q235 carbon steel specimens at different temperature to verify our theories. This paper offers a series of theoretical bases to solve the temperature compensation problem of Barkhausen testing method.