Characteristics of magnetic memory signals for medium carbon steel under static tensile conditions

来源期刊：中南大学学报(英文版)2005年第z2期

论文作者：尹大伟 徐滨士 董世运 杨尚林 董丽虹

文章页码：107 - 111

Key words：magnetic memory； static tensile； magnetic field strength； magnetic domain

Abstract: To test the magnetic signals leaked from the surface of specimens during loading, the experiments of the static tensile of medium carbon 45# steel were carried out. The results show that the magnetic field strength values rapidly vary when the load began, and the curves of the magnetic field strength change from irregularity to regularity with the increase of the load. Furthermore, by comparing with the state of on-line testing, it is found that the magnetic signals of out-of-line testing has more practicability. In the course of loading, though the dots of passing zero of the magnetic field strength continually changed their positions and quantities, the last rupture places were always approached by the dots of passing zero since the elastic loading phase. Some certain relations should exist between external stress and changing of magnetic signals inside the material, and correlative explanation is made based on dislocation theory and the mechanism of magnetic domain action, which provides the basis for further research of magnetic memory.