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Yu. V. Khudorozhkova, S. M. Zadvorkin, S. V. Burov, and I. S. Kamantsev


DOI: 10.17804/2410-9908.2023.1.024-040

The study of the applicability of magnetic and optical methods to the detection
of prefracture zones under fatigue degradation of structural materials is exemplified by the 09G2S steel. The regularities of changes in the signal of an attached fluxgate gradiometer with the increasing number of loading cycles have been revealed; namely, significant changes in the gradiometer readings on individual specimen surface areas prove to result from the formation of fracture zones. The change in the value of the coefficient of correlation among the speckle images is studied at different stages of cyclic testing. The appearance of speckle image heterogeneity is shown to be due to fracture nucleation. Thus, the applicability of magnetic and speckle-interferometric methods to detecting prefracture zones in objects under cyclic loading is substantiated.

Acknowledgments: The work was performed under state assignment No. AAAA-A18-118020790148-1. The study used the equipment of the Plastometriya shared research facilities. We appreciate the assistance of Prof. A. P. Vladimirov, staff member of the laboratory of engineering diagnostics, IES UB RAS, who has developed the original procedure of dynamic optical speckle interferometry.

Keywords: magnetic state, flux gate, gradiometer, leakage field, speckle image, surface profile, cyclic testing, nondestructive testing, pipe steel


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Article reference

Detection of Prefracture Zones in Structural Materials by Magnetic and Optical Methods / Yu. V. Khudorozhkova, S. M. Zadvorkin, S. V. Burov, and I. S. Kamantsev // Diagnostics, Resource and Mechanics of materials and structures. - 2023. - Iss. 1. - P. 24-40. -
DOI: 10.17804/2410-9908.2023.1.024-040. -
URL: http://eng.dream-journal.org/issues/2023-1/2023-1_392.html
(accessed: 05/22/2024).


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Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  S.V. Smirnov
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