Skip to main content
SpringerLink
Log in

Testing for Discontinuities in Metals Using Film Flux Detectors

  • Electromagnetic Methods
  • Published:
Russian Journal of Nondestructive Testing Aims and scope Submit manuscript

Abstract

Results of studying the use of film flux detectors for monitoring artificial continuity defects are presented. Photographs are provided for a film flux detector with images of magnetic fields due to holes 2.0 × 10–3 m in diameter in an iron plate with a thickness of 6 × 10–4 m and a hole 1.0 × 10–2 m in diameter in an aluminum plate with a thickness of 2.0 × 10–3 after exposure to magnetic field pulses with a rise time of approximately 2.0 × 10–5–5.0 × 10–5 s, as well as of fields that passed through gaps 1 × 10–4 and 1 × 10–5 m wide between joined aluminum plates with a thickness of 3.0 × 10–3 m for different applied-field directions. Results of measuring the maximum value of the tangential Hτm (3.9 × 104 A/m) and normal Hτm (3.3 × 104 A/m) components of the strength of the total magnetic field near the surface of the aluminum plate (in the immediate vicinity to the hole in it) using a discrete magnetic-field sensor are presented. Based on the research, magnetic pulsed methods of searching for continuity defects in objects made of diamagnetic, paramagnetic, and ferromagnetic metals have been developed. These methods consist in exposing an object, with a flux detector atatched to it, to a magnetic field pulse and determining the defectiveness of the object based on the analysis of the optical image of magnetic field by studying the shape of the image and the distribution of gray levels (chromaticity) in it, while taking account of anisotropy parameters and the calibration characteristics of the sensor. The amplitude of the field pulse, its rise time, the shape of the leading and trailing edges, the number of pulses, the parameters of magnetic field spikes were preliminarily determined and the uniform illumination of the detector surface was ensured. Before use, the detector was demagnetized or polarized; the type and parameters of the magnetic field inductor were determined. It has been proposed to increase the image contrast by exposing the object–detector assembly to a series of pulses.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Kozlov, V.S., Tekhnika magnitograficheskoi defektoskopii (Magnetographic Nondestructive Testing Technique), Minsk: Vysheishaya Shkola, 1976.

    Google Scholar 

  2. Mikhailov, S.P. and Shcherbinin, V.E., Fizicheskie osnovy magnitograficheskoi defektoskopii (The Physical Basics of Magnetographic Nondestructive Testing), Moscow: Nauka, 1992.

    Google Scholar 

  3. Pavlyuchenko, V.V. and Doroshevich, E.S., Rep. Belarus Patent no. 12742, IPC C1 BY, G 01 N 27/72, Magnetooptical flaw detector, Afitsyiny Byull., Minsk: Natl. Cent. Intelect. Prop., 2009, no. 6, pp. 121–122. Applicant BNTU; application no. a20071581; date December 19, 2007.

    Google Scholar 

  4. Lukhvich, A.A., Bulatov, O.V., Luk’yanov, A.L., Polyakova, M.N., and Mosyakin, V.V., Magnetodynamic testing of the thickness of nickel coatings applied under chromium coatings on two-layer (nonferromagnet-ferromagnet) bases, Russ. J. Nondestr. Test., 2015, vol. 51, no. 1, pp. 1–7.

    Article  CAS  Google Scholar 

  5. Atavin, V.G., Uzkikh, A.A., and Iskhuzhin, R.R., Tuning out from base electric conductivity in conductive-coating thickness gauging, Russ. J. Nondestr. Test., 2018, vol. 54, no. 1, pp. 77–83.

    Article  Google Scholar 

  6. Shur, M.L., Smorodinskii, Y.G., and Novoslugina, A.P., The magnetic field of an arbitrary shaped defect in a plane-parallel plate, Russ. J. Nondestr. Test., 2015, vol. 51, no. 11, pp. 669–679.

    Article  Google Scholar 

  7. Skvortsov, B.V., Samsonov, A.S., Borminskii, S.A., and Zhivonosnovskaya, D.M., Theoretical basics for inspection of conducting coatings in aircraft fuel tanks, Russ. J. Nondestr. Test., 2017, vol. 53, no. 5, pp. 378–386.

    Article  Google Scholar 

  8. Sukhanov, D.Ya. and Sovpel’, E.S., Magnetic induction tomography of electrical circuits and devices, Izv. VUZov, 2015, vol. 58, no. 10/3, pp. 73–75.

    Google Scholar 

  9. Sukhanov, D.Ya. and Zav’yalova, K.V., Representing the field of an electrically conductive object as the superposition of fields of elementary eddy currents and their tomography, Izv. VUZov, 2017, vol. 60, no. 11, pp. 28–34.

    Google Scholar 

  10. Novikov, V.A., Shilov, A.V., and Kushner, A.V., Visualization of fields due to defects in ferromagnetic objects using “Flux-detector” film, Kontrol’ Diagn., 2010, no. 5, pp. 18–22.

    Google Scholar 

  11. Novikov, V.A. and Shilov, A.B., Evaluation of the coefficient of reflection for revealing magnetic fields via film in a defect zone during the control of ferrous objects, Russ. J. Nondestr. Test., 2014, vol. 50, no. 2, pp. 72–79.

    Article  Google Scholar 

  12. Pavlyuchenko, V.V. and Doroshevich, E.S., Using magnetic hysteresis for testing electroconductive objects in pulsed magnetic fields, Russ. J. Nondestr. Test., 2013, vol. 49, no. 6, pp. 334–346.

    Article  Google Scholar 

  13. Pavlyuchenko, V.V. and Doroshevich, E.S., Nondestructive control of objects made of electroconductive materials in pulsed magnetic fields, Russ. J. Nondestr. Test., 2010, vol. 46, no. 11, pp. 810–818.

    Article  Google Scholar 

  14. Pavlyuchenko, V.V. and Doroshevich, E.S., Rep. Belarus Patent no. 10440, IPC C2 BY, G 01 N 27/00, Method of magnetooptical testing of a magnetic electrically conductive material Afitsyiny Byull., Minsk: Natl. Cent. Intelect. Prop., 2008, no. 2, p. 97. Applicant BNTU; application no. a20060200; date March 9, 2006.

    Google Scholar 

  15. Pavlyuchenko, V.V. and Doroshevich, E.S., Using film flux detectors to determine properties of conducting and magnetic objects, Russ. J. Nondestr. Test., 2018, vol. 54, no. 1, pp. 70–76.

    Article  Google Scholar 

  16. Vishnevskii, V.G., Berzhanskii, V.N., Kozik, G.P., Mikhailov, V.I., Pankov, F.N., Levyi, S.V., and Agalidi, Yu.S., Magnetooptical eddy-current testing: introscopic and magnetographic methods, Uch. Zap. Vernadsky Tavrida State Univ., Ser. Fiz. Mat. Nauki, Simferopol’, 2011, vol. 24 (63), no. 2, pp. 127–140.

    Google Scholar 

  17. Levyi, S.V. (UA), Agalidi, Yu.S. (UA), and Shumskii, I.P. (BY), RF Patent no. 2464555, IPC C1 RU, G01N27/90, Inductor of eddy currents for magnetic-tape inspection and a scanner based on it, Appl. July 1, 2009, Publ. October 10, 2012.

    Google Scholar 

  18. Pavlyuchenko, V.V., Sychik, V.A., and Doroshevich, E.S., Development of magnetooptical testing systems, in Priborostroenie-2008. Mater. Mezhdunar. Nauchn.-Tekh. Konf. BNTU (Instrument Making-2008. Proc. Int. Sci. Tech. Conf. BNTU), Minsk, 2008, pp. 109–110.

    Google Scholar 

  19. Doroshevich, E.S. and Pavlyuchenko, V.V., Device for quality control of products made of magnetic and electrically conductive materials, Priborostroenie-2009. Mater. 2-i Mezhdunar. Nauchn.-Tekh. Konf. BNTU (Instrument Making-2009. Proc. Int. Sci. Tech. Conf. BNTU), Minsk, 2009, pp. 57–58.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Belarusian National Technical University, Minsk, 220013, Belarus

    V. V. Pavlyuchenko & E. S. Doroshevich

Authors
  1. V. V. Pavlyuchenko
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. E. S. Doroshevich
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to V. V. Pavlyuchenko or E. S. Doroshevich.

Additional information

Russian Text © V.V. Pavlyuchenko, E.S. Doroshevich, 2019, published in Defektoskopiya, 2019, No. 1, pp. 44–52.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pavlyuchenko, V.V., Doroshevich, E.S. Testing for Discontinuities in Metals Using Film Flux Detectors. Russ J Nondestruct Test 55, 48–58 (2019). https://doi.org/10.1134/S106183091901008X

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S106183091901008X

Keywords

Search

Navigation