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Variation regularity of metal magnetic memory signals with inspecting time-interval and location

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Abstract

Influences of inspecting time-interval and location on varying behavior of metal magnetic memory (MMM) signals of defects were studied. Different areas in two precracked weldments were inspected at different time-intervals by type TSC-1M-4 stress-concentration magnetic inspector to obtain MMM signals. Mechanisms of MMM signals varying behavior with inspecting time and space were analyzed and discussed respectively. It is found that MMM signals don’t change with inspecting time-interval, since stress field and magnetic leakage field maintain unchanged at any time after welding. On the other hand, MMM signals differ greatly for different inspecting locations, because stress field and magnetic leakage field are unevenly distributed in defective ferromagnetic materials.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China

    Yan Chun-yan Phd  (严春妍), Li Wu-shen  (李午申) & Di Xin-jie  (邸新杰)

  2. Petroleum-Gas Pipeline Research Institute of China, Langfang, 065000, China

    Xue Zhen-kui  (薛振奎), Bai Shi-wu  (白世武) & Liu Fang-ming  (刘方明)

Authors
  1. Yan Chun-yan Phd  (严春妍)
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  2. Li Wu-shen  (李午申)
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  3. Di Xin-jie  (邸新杰)
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  4. Xue Zhen-kui  (薛振奎)
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  5. Bai Shi-wu  (白世武)
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  6. Liu Fang-ming  (刘方明)
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Corresponding author

Correspondence to Yan Chun-yan Phd  (严春妍).

Additional information

Foundation item: Project(50475113) supported by the National Natural Science Foundation of China; Project(20030056002) supported by Specialized Research Fund for Doctoral Program of Higher Education, China

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Yan, Cy., Li, Ws., Di, Xj. et al. Variation regularity of metal magnetic memory signals with inspecting time-interval and location. J Cent. South Univ. Technol. 14, 319–323 (2007). https://doi.org/10.1007/s11771-007-0063-7

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  • DOI: https://doi.org/10.1007/s11771-007-0063-7

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