Plastic processing operations of ferromagnetic materials may cause significant mechanical stress, which has a strong impact on its final magnetic behavior. In this paper, the magneto-mechanical correlations between the stress-strain behavior and magnetic Barkhausen noise emission in three typical steels subjected to uniaxial tension were studied comparatively, the tensile damage and fracture morphology of each sample was identified by magnetic measurements and scanning electron microscopy. The results show that the characteristics values of Barkhausen noise envelope can be approximated by a parabolic function of the carbon content experimentally and theoretically. In the elastic region, the Barkhausen noise response exhibits progressive growth with increasing strain, and reaches saturation at a critical point for the stress-induced magnetic anisotropy. However, once plastic deformation occurs, the Barkhausen noise signal intensity appears a downward trend until specimen failure, because the increasing dislocation tangles further hinder the domain wall motion. According to the mapping of Barkhausen noise eigenvalues, the location of tensile cracking is determined with a very satisfactory agreement. This indicates that the magnetic Barkhausen noise technique can be used for the nondestructive quantitative evaluation of elastoplastic deformation and failure location of ferromagnetic products.

铁磁材料的塑料加工操作可能会产生显着的机械应力，这对其最终的磁性行为有很大影响。本文比较研究了三种典型钢在单轴拉伸作用下的应力应变行为与磁巴克豪森噪声发射之间的磁力相关性，并通过磁测量和扫描电子显微镜识别了每个样品的拉伸损伤和断裂形貌。结果表明，巴克豪森噪声包络线的特征值可以在实验和理论上用碳含量的抛物线函数来近似。在弹性区域，巴克豪森噪声响应随着应变的增加而逐渐增长，并在应力引起的磁各向异性的临界点达到饱和。然而，一旦发生塑性变形，巴克豪森噪声信号强度就会呈现下降趋势，直到样品失效，因为位错缠结的增加进一步阻碍了磁畴壁运动。根据巴克豪森噪声特征值的映射，确定了拉伸裂纹的位置，吻合得非常满意。这表明磁巴克豪森噪声技术可用于铁磁产品弹塑性变形和失效定位的无损定量评价。根据巴克豪森噪声特征值的映射，确定了拉伸裂纹的位置，吻合得非常满意。这表明磁巴克豪森噪声技术可用于铁磁产品弹塑性变形和失效定位的无损定量评价。根据巴克豪森噪声特征值的映射，确定了拉伸裂纹的位置，吻合得非常满意。这表明磁巴克豪森噪声技术可用于铁磁产品弹塑性变形和失效定位的无损定量评价。