Novel method for the accurate determination of magnetocrystalline energy from Barkhausen noise in ferromagnetic materials

A new method is presented for the estimation of the angular dependence of the magnetocrystalline energy from Barkhausen noise in API 5L steels in the branch from saturation to remanence. The magnetocrystalline energy was predicted from X-ray texture measurements and compared with the estimations produced from Barkhausen noise measurements in circular samples of six steels with different microstructures, crystallographic textures, and measuring planes. The angular dependences of the magnetocrystalline energy obtained from Barkhausen noise were in good agreement with the predictions made from X-ray texture measurements for all the studied steel samples and measuring planes. The results of this study corroborate that Barkhausen noise measurements based on the proposed method have the ability of accurately determining the magnetocrystalline energy in low-carbon steels and confirm that the strong correlation between the magnetocrystalline energy and the angular dependence of the Barkhausen noise signal is mainly due the role that crystallographic texture plays in the magnetization process of ferromagnetic materials in the branch from saturation to remanence.