Effect of stress on the magnetic Barkhausen noise energy cycles: A route for stress evaluation in ferromagnetic materials

The analysis of the magnetic Barkhausen noise energy hysteresis cycles, MBNenergy(H), is a promising nondestructive testing method for evaluating internal mechanical stresses in ferromagnetic structural steels. This study applies this method to two ferromagnetic materials with significantly different behaviors subjected to uniaxial tensile stress. Coercivity is shown to be the most sensitive tensile stress indicator. A multiscale model is then developed to simulate the stress-dependent MBNenergy(H) anhysteretic behavior. Combined with a hysteresis contribution, it successfully reproduces the whole cycle. 2D simulation predictions reveal that the identification of uniaxial tensile stress is more efficient when the magnetic field is applied with an angle between 30 degrees and 75 degrees from the stress direction. The proposed modeling approach allows the prior determination of the most favorable configurations for the sensor orientation depending on the material tested and all available a priori knowledge of the stress configuration.

Automated summary

The analysis of magnetic Barkhausen noise energy hysteresis cycles is a nondestructive testing method that shows promise in evaluating internal mechanical stresses in ferromagnetic structural steels. The study demonstrates that coercivity is the most sensitive indicator of tensile stress. A multiscale model is developed to simulate stress-dependent anhysteretic behavior, which successfully reproduces the entire cycle. 2D simulation predictions indicate that uniaxial tensile stress can be efficiently identified within a specific angle range of the applied magnetic field. This modeling approach allows the determination of the optimal sensor orientation for different materials and stress configurations.