通过改变交变磁场的频率(磁感应强度一定),研究了QSTE420钢焊缝的磁致微区塑性变形和磁致伸缩幅值随频率的变化趋势,并探讨了磁致微区塑性变形和磁致伸缩两者之间的关系.结果表明:随交变磁场频率的降低,QSTE420钢焊缝区域的磁致塑性变形更加明显,而磁致伸缩幅值则逐渐减小;磁致伸缩所引起的应力、应变不是磁致微区塑性变形的主要原因.
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