Magneto‐acoustic emission (MAE) in pipeline steel was investigated to study its dependence on the amplitude of the excitation flux density, ‖B‖, in the sample. At low magnetizations, the MAE rms voltage exhibited a nearly linear dependence on ‖B‖ in the sample, while at higher magnetizations it tended to saturate. The ‖B‖ dependence of MAE activity was analyzed in terms of the pulse‐height distribution of the MAE wave forms. It was observed that at low ‖B‖, the MAE activity is due to domain wall motion while at high ‖B‖ the genesis seems to be also from rotation of the domain magnetization vectors. The importance of analyzing MAE activity in terms of the pulse‐height distribution of the MAE wave forms is emphasized.
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机译：研究了管道钢中的磁连字符声发射 （MAE），以研究其对样品中激发磁通密度 ‖B‖ 振幅的依赖性。在低磁化强度下，MAE rms电压对样品中的‖B‖表现出近乎线性的依赖性，而在较高的磁化强度下，它趋于饱和。根据MAE波形的脉冲高度分布分析了MAE活动的‖B‖依赖性。据观察，在低‖B‖时，MAE活动是由于畴壁运动，而在高‖B‖下，成因似乎也来自畴磁化矢量的旋转。强调了根据 MAE 波形的脉冲高度分布来分析 MAE 活动的重要性。
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