A Methodology for Identifying Defects in the Magnetic Flux Leakage Method and Suggestions for Standard Specimens

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• 作者：Yanhua Sun ; Bo Feng ; Shiwei Liu ; Zhijian Ye…
• 关键词：Magnetic flux leakage (MFL) ; Nondestructive evaluation (NDE) ; Testing mechanism ; Concave defect ; Bump ; shaped defect ; Raised signal ; Sunken signal
• 刊名：Journal of Nondestructive Evaluation
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：34
• 期：3
• 全文大小：2,558 KB
• 参考文献：1.Spierer, E., Harbor, B.: Apparatus and process for flux leakage testing using transverse and vectored magnetization, US Patent 4477776, 1984
  2.F?rster, F.: New findings in the field of nondestructive magnetic leakage field inspection. NDT Int. 19(1), 3-3 (1986)View Article
  3.Hwang, J., Lord, W.: Finite element modeling of magnetic field/defect interactions. ASTM J. Test. Eval. 3(1), 21-5 (1975)View Article
  4.Edwards, C., Palmer, S.: The magnetic leakage field of surface breaking cracks. J. Phys. D Appl. Phys. 19, 657-73 (1986)View Article
  5.Atherton, D.L., Daly, M.G.: Finite element calculation of magnetic flux leakage detector signals. NDT Int. 20, 235-38 (1987)View Article
  6.Sun, Y.H., Kang, Y.H.: High-speed magnetic flux leakage technique and apparatus based on orthogonal magnetization for steel pipe. Mater. Eval. 68(4), 452-58 (2010)
  7.Eickemeyer, R.: Magnetic gage for testing the magnetic conductivity of metals, US Patent 413338, 1889
  8.Burrows, C.W.: Method of and apparatus for testing magnetizable objects by magnetic leakage, US Patent 1322405, 1919
  9.Dutta, S., Ghorbel, F., Stanley, R.: Dipole modeling of magnetic flux leakage. IEEE Trans. Magn. 45(4), 1959-965 (2009)View Article
  10.Li, Y., Wilson, J., Tian, G.Y.: Experiment and simulation study of 3D magnetic field sensing for magnetic flux leakage defect characterization. NDT Int. 40(2), 179-84 (2007)View Article MATH
  11.Tsukada, K., Yoshioka, M., Kawasaki, Y., Kiwa, T.: Detection of back-side pit on a ferrous plate by magnetic flux leakage method with analyzing magnetic field vector. NDT E Int. 43, 323-28 (2003)View Article MATH
  12.Katragadda, G., Si, J.T., Lord, W., Sun, Y.S., Udpa, S., Udpa, L.: A comparative study of 3D and axisymmetric magnetizer assemblies used in magnetic flux leakage inspection of pipelines. IEEE Trans. Magn. 32(3), 1573-576 (1996)View Article MATH
  13.Le, M., Lee, J., Jun, J., Kim, J., Moh, S., Shin, K.: Hall sensor array based validation of estimation of crack size in metals using magnetic dipole models. NDT E Int. 53, 18-5 (2013)View Article
  14.Mukhopadhyay, S., Srivastava, G.P.: Characterisation of metal loss defects from magnetic flux leakage signals with discrete wavelet transform. NDT E Int. 33, 57-5 (2000)View Article
  15.Katoh, M., Nishio, K., Yamaguchi, T.: The influence of modeled B-H curve on the density of the magnetic leakage flux due to a flaw using yoke-magnetization. NDT E Int. 37(8), 603-09 (2004)View Article
  16.Dutta, S.M., Ghorbel, F.H., Stanley, R.K.: Simulation and analysis of 3-D magnetic flux leakage. IEEE Trans. Magn. 45(4), 1966-972 (2009)View Article
  17.Krause, T.W., Donaldson, R.M., Barnes, R., Atherton, D.L.: Variation of the stress dependent magnetic flux leakage signal with defect depth and flux density. NDT E Int. 29(2), 79-6 (1996)View Article
  18.Li, X.M., Ding, H.S., Bai, S.W.: Research on the stress-magnetism effect of ferromagnetic materials based on three-dimensional magnetic flux leakage testing. NDT E Int. 62, 50-4 (2014)View Article MATH
  19.Mandayam, S., Udpa, L., Upda, S.S., Lord, W.: Invariance transformations for magnetic flux leakage signals. IEEE Trans. Magn. 32(3), 1577-580 (1996)View Article
  20.Kopp, G., Willems, H.: Sizing limits of metal loss anomalies using tri-axial MFL measurements: a model study. NDT E Int. 55, 75-1 (2013)View Article MATH
  21.Altschuler, E., Pignotti, A.: Nonlinear model of flaw detection in steel pipes by magnetic flux leakage. NDT E Int. 28(1), 35-0 (1995)View Article
  22.Goktepe, M.: Non-destructive crack detection by capturing local flux leakage field. Sens. Actuators A 91(1), 70-2 (2001)View Article
  23.Zhang, Y., Ye, Z.F., Wang, C.: A fast method for rectangular crack sizes reconstruction in magnetic flux leakage testing. NDT E Int. 42, 369-75 (2009)View Article
  24.Saha, S., Mukhopadhyay, S., Mahapatra, U., Bhattacharya, S., Srivastava, G.P.: Empirical structure for characterizing metal loss defects from radial magnetic flux leakage signal. NDT E Int. 43, 507-12 (2010)View Article
  25.Le, M., Lee, J., Jun, J., Kim, J.: Estimation of sizes of cracks on pipes in nuclear power plants using dipole moment and finite element methods. NDT E Int. 58, 56-3 (2013)View Article
  26.Uetake, I., Saito, T.: Magnetic flux leakage by adjacent parallel surface slots. NDT E Int. 30(6), 371-76 (1997)View Article
  27.Minkov, D., Shoji, T.: Method for sizing of 3-D surface breaking flaws by leakage flux. NDT E Int. 31(5), 317-24 (1998)View Article
  28.Coughlin, C.R., Clapham, L., Atherton, D.L.: Effects of stress on MFL responses from elongated corrosion pits in pipeline steel. NDT E Int. 33, 181-88 (2000)View Article
  29.Amineh, R.K., Koziel, S., Nikolova, N.K., Bandler, J.W., Reilly, J.P.: A space mapping methodology for defect characterization from magnetic flux leakage measurements. IEEE Trans. Magn. 44(8), 2058-065 (2008)View Article
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• 作者单位：Yanhua Sun (1)
  Bo Feng (1)
  Shiwei Liu (1)
  Zhijian Ye (1)
  Shaobo Chen (1)
  Yihua Kang (1)
  
  1. School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Characterization and Evaluation Materials
  Vibration, Dynamical Systems and Control
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4862

文摘

In magnetic flux leakage (MFL) testing technology, the MFL signals are thought to result from all defects and are used in their evaluation. The tested defects include two types of defects, concave and bump-shaped features, and recently described mechanisms in the MFL method indicate that the former defects produce positive MFL because of magnetic refraction and the latter ones produce negative magnetic fields because of self-magnetization regulation; consequently, these defects result in raised test signal waves and sunken test signal waves, respectively. Thereby, a new methodology for accurately identifying the defect type based on the mapping relation between the signal features and defect types is proposed. Both simulations and experiments with three representative defects (i.e., notch, protrusion and combination) were conducted to confirm their identification using this new methodology. Combined with MFL standards such as American Society for Testing and Materials (ASTM) E570-09 (Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products, 2009) and British Standards (BS) EN 10246-4 (Non-destructive Testing of Steel Tubes—Part 4: Automatic Full Peripheral Magnetic Transducer/Flux Leakage Testing of Seamless Ferromagnetic Steel Tubes for the Detection of Transverse Imperfections, 2007), suggestions for standard specimens with reference defects that consist of both types of defects are provided.