ISSN 3041-1823. Information Extraction and Processing. 2025. Issue 53 (129)
Home Back to issue
Application of magneto-optical method for non-destructive testing of riveted joints
Stasyshyn I.V.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Lviv Polytechnic National University, Lviv
Maksymenko O.P.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Voronyak T.I.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Ivasenko I.B.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Lviv Polytechnic National University, Lviv
Berehulyak O.R.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Stetsko I.H.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv

https://doi.org/10.15407/vidbir2025.53.058

Keywords: magneto-optical images, Faraday effect, crack detection, non-destructive testing, image processing.

Cite as: Stasyshyn, I. V.; Maksymenko, O. P.; Voronyak, T. I.; Ivasenko, I. B.; Berehulyak, O. R.; Stetsko, I. H. Application of magneto-optical method for non-destructive testing of riveted joints. Information Extraction and Processing 2025, 53(129), 58-64. DOI:https://doi.org/10.15407/vidbir2025.53.058

Download
Abstract

Test samples of steel riveted joints with pre-formed controlled defects were analyzed during experimental studies using the magneto-optical method of non-destructive testing. The samples were manufactured in accordance with established technical conditions, which made it possible to reproduce real operating conditions and ensure the reproducibility of the results. The main focus was on detecting defects on the inner surface of holes characteristic of riveted joints, since this area is usually most susceptible to damage during loading and riveting. An exciting constant magnetic field in the tested samples was created using a specially designed electromagnet, which was supplied with current in the range from 0.1 to 3 A. This approach made it possible to implement a controlled change in magnetic induction in the control area and to investigate the possibility of detecting defects of various sizes at different levels of magnetization. The formed field created local induction leaks at the damage sites, which led to the appearance of contrasting magneto-optical images after interaction with the optical system. After recording and digital processing of the images, the geometric characteristics of the detected defects were determined. In particular, it was established that the minimum defect on the inner surface of the hole was 0.2×0.2 mm2. The field of view was 10×15 mm2, which provided sufficient spatial coverage for visualizing both local damage and the overall surface structure. To improve the quality of visualization and the contrast of small defects, a histogram equalization algorithm was applied. The use of this digital processing method made it possible to significantly increase the visibility of defects that had low contrast in the original images.

References

    1. Heintzmann, R. Introduction to Optics and Photophysics. In Fluorescence Microscopy: From Principles to Biological Applications, 2nd ed.; Kubitscheck, U. Eds.; John Wiley & Sons, 2017, pp 1-22.

    2. Magneto-optical imaging; Johansen, T.H., Shantsev, D.V., Eds.; Springer Science & Business Media, 2012.

    3. Gao, X. et al. Magneto-optical imaging characteristics of weld defects under alternating and rotating magnetic field excitation. Optics & Laser Technology 2019, 112, 188-197. https://doi.org/10.1016/j.optlastec.2018.11.005

    4. Ma, N. et al. Magneto-optical imaging of arbitrarily distributed defects in welds under combined magnetic field. Metals 2022, 12 (6), 1055. https://doi.org/10.3390/met12061055

    5. Wang, C. et al. Research on microstructure characteristics of welded joint by magneto-optical imaging method. Metals 2022, 12 (2), 258. https://doi.org/10.3390/met12020258

    6. Tehranchi, M.M.; Hamidi S.M.; Eftekhari, H.; Karbaschi, M.; Ranjbaran, M. The inspection of magnetic flux leakage from metal surface cracks by magneto-optical sensors. Sensors and Actuators A: Physical 2011, 172 (2), 365-368. https://doi.org/10.1016/j.sna.2011.09.010

    7. Maksymenko O.P., Voronyak T.I., Stasyshyn I.V., Syvorotka I.I. Evaluation of the characteristics of ferrite garnet films for magneto-optical control of materials. Information Extraction and Processing 2024, 52 (128), 61-67. https://doi.org/10.15407/vidbir2024.52.061

    8. Stasyshyn, I.; Suriadova, O. Application of the Magneto-Optical Effect in Non-Destructive Testing. Materials Science and Surface Engineering: MSSE2023 Proceedings, Lviv, Ukraine, September 27-29, 2023, pp 235-238. https://doi.org/10.15407/msse2023.235

    9. Landau, L.D.; Lifshitz, E.M. Electrodynamics of Continuous Media; Pergamon Press, 1984. https://doi.org/10.1016/B978-0-08-030275-1.50007-2

    10. Zvezdin, A.K.; Kotov, V.A. Modern Magnetooptics and Magnetooptical Materials; CRC Press, 1997. https://doi.org/10.1201/9780367802608

    11. Inoue, M. et al. Magnetophotonics: From Theory to Applications; Springer, 2013. https://doi.org/10.1007/978-3-642-35509-7

    12. Liu, Q.; Ye, G.; Gao, X.; Zhang, Y.; Gao, P.P. Magneto-optical imaging nondestructive testing of welding defects based on image fusion. NDT&E International 2023, 138, 102887. https://doi.org/10.1016/j.ndteint.2023.102887

    13. Ghimire, K.; Haneef, H.F.; Collins, R.W.; Podraza, N.J. Optical properties of single-crystal Gd3Ga5O12 from the infrared to ultraviolet. Phys. Status Solidi (B) 2015, 252, 2191-2198. https://doi.org/10.1002/pssb.201552115