Characteristics of magnetic memory signals for medium carbon steel under static tensile conditions |
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Authors: | Yin Da-wei Xu Bin-shi Dong Shi-yun Yang Shang-lin and Dong Li-hong |
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Affiliation: | (1) Airplane Staff Room, Aviation University of Air Force, 130001 Changchun, China;(2) National Key Laboratory for Remanufacturing, 100072 Beijing, China;(3) College of Mechanical and Electrical Engineering, Harbin Engineering University, 150001 Harbin, China |
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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.
Foundation item: Project(50235030) supported by the National Natural Science Foundation of China |
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Keywords: | magnetic memory static tensile magnetic field strength magnetic domain |
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