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https://doi.org/10.17559/TV-20150529131442

Monitoring yield failure of ferromagnetic materials with spontaneous abnormal magnetic signals

Zhongchao Qiu ; School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Weimin Zhang ; School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Xia Yu ; School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Yan Guo ; School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Long Jin ; School of Mechanical Engineering, Guangxi University of Science and Technology, Guangxi Liuzhou 545006, China


Puni tekst: hrvatski pdf 569 Kb

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preuzimanja: 461

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Puni tekst: engleski pdf 569 Kb

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Sažetak

Yield failure is a common failure mode of low carbon steels in practical engineering application, so detecting it timely and accurately is of great significance. Tensile tests were carried out under different loads which covered tensile elastic loads up to plastic deformation. Meanwhile, the normal components of spontaneous abnormal magnetic field, the Hp(y) signals, were measured offline using the TSC-1M-4 type instrument. The correlation between the magnetic gradient K and the tension load F is discussed. The results show that the Hp(y) signals, which change gradually from negative to positive, approach a straight line and have a unique zero-crossing point in the elastic stage, and the magnetic gradient K fluctuates with the load increasing. However, the distribution curve of the Hp(y) signals has a peak and a trough in the yield stage, and the Lüders bands appear and expand as strain increases. The phenomenon of magnetic polarity reversal appears so that the magnetic gradient K changes from positive to negative, thus the mechanical state of the specimens can be judged from the magnetic gradient K.

Ključne riječi

magnetic domain, magnetic polarity reversal, metal magnetic memory, residual compressive stress, yield failure

Hrčak ID:

143147

URI

https://hrcak.srce.hr/143147

Podaci na drugim jezicima: hrvatski

Posjeta: 1.362 *