目的是定量研究一种新颖的降低材料内应力的非热方法、低频交变磁处理法的效果及其微观机理。在试验研究了该方法降低试样内残余应力的程度、特点和工艺参数的影响后 ,通过透射电镜分析 ,着重观察了磁处理时材料内部的位错运动规律。结果表明 ,低频交变磁处理用于降低材料的内应力是有效的 ,其主要应力降低原因是磁处理过程引起的位错均匀化。在实验结果和理论分析的基础上 ,提出了磁处理时材料内应力松弛的物理模型 ,合理地解释了低频交变磁处理方法降低残余应力的机理 The purpose is to quantitatively study a novel non-thermal method to reduce the internal stress of materials, the effect of low-frequency alternating magnetic treatment and its microscopic mechanism. After the experimental study of the method to reduce the degree of residual stress in the sample, the characteristics and process parameters, through transmission electron microscopy analysis focused on the dislocation movement within the material during magnetic treatment. The results show that low frequency alternating magnetic treatment is effective to reduce the internal stress of the material, and the main stress reduction is due to the dislocation homogenization caused by the magnetic treatment. Based on the experimental results and theoretical analysis, a physical model of stress relaxation in the material during the magnetic treatment is proposed, and the mechanism of reducing the residual stress by the low frequency alternating magnetic treatment is reasonably explained