金属磁记忆检测可以实现铁磁试件的早期诊断和应力评估, 由于缺乏公认的解释机理和定量的手段, 该技术尚未得到公认。通过对铁磁试件(Q235)进行循环加载, 将金属磁记忆技术与巴克豪森法结合起来, 进一步探讨金属磁记忆的产生和累积机理。研究表明, 实际检测中, 金属磁记忆信号波形不对称且峰值较大的一侧往往组织分布相对不均匀, 循环加载后峰值变化更为明显。循环加载后磁场的分布变化, 为研究和建立金属磁记忆信号与应力集中区的关系提供了依据。

The Metal Magnetic Memory testing can be used to estimate stress of ferromagnetic materials and achieve early diagnosis. However, because of the lack of a unified theory on it and of the quantitative methods, this technology has not been recognized. In order to further understand the generation and accumulation mechanism, the ferromagnetic specimen(Q235) under cyclic loading was under study, and the technology of metal magnetic memory combined with the Magnetic Barkhausen noise was discussed. The results showed that the side of metal magnetic memory signal waveform was asymmetry and the side of the lager peak had an uneven distribution of the organizational structure, the peak would be changed obviously after cyclic loading. According to the change of distribution under cyclic loading, it offers a foundation for studying the relation between the signal of metal magnetic memory and stress concentration.