PSI - Issue 20

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000 – 000

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Procedia Structural Integrity 20 (2019) 4–8

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Effect of cyclic loading on the magnetic behavior of hot-rolled pipe steel 08G2B Eduard Gorkunov a, *, Anna Povolotskaya a , Sergey Zadvorkin a , Evgeniya Putilova a , Aleksandr Mushnikov a Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St., Ekaterinburg, 620049, Russia Abstract The paper reports on the results of studying the effect of the zero-to-tension cyclic loading, with an amplitude approximately corresponding to conventional yield strength, on the magnetic parameters of the 08G2B hot-rolled pipe steel, including its longitudinal and transverse magnetostriction. The parameters uniquely varying with the number of cycles have been determined, and this principally enables these parameters to be used for the development of nondestructive methods of testing fatigue degradation in the material of structures made of the steel under study. It has been shown that the presence of extrema in the region of positive fields on the field dependences of differential magnetic permeability, the value of the fields at which they are formed, and the magnitude of the extrema allow one to evaluate the strain accumulated in a cyclically loaded product. It has been demonstrated that, as the number of zero-to-tension cycles grows, the field dependences of the longitudinal and transverse magnetostrictions of the steel behave the same way as under static compression. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Effect of cyclic loading on the magnetic behavior of hot-rolled pipe steel 08G2B Eduard Gorkunov a, *, Anna Povolotskaya a , Sergey Zadvorkin a , Evgeniya Putilova a , Aleksandr Mushnikov a Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St., Ekaterinburg, 620049, Russia Abstract The paper reports on the results of studying the effect of the zero-to-t nsion cyclic loading, with an amplitud approximately c rrespo ding to con ntion l yield strength, on the magnetic parameters of the 08G2B hot-rolled pipe steel, including its longitudinal and transverse magnetostriction. The parameters uniquely arying with the umber of cycl s have been determined, and this principally enables these parameters to be used for the development of nondestructive methods f testing fatigu degradation in the material of structures made of the steel under study. It has been shown that the presence of extrema in th region of positive fields on the field dependences of differential magnetic per eability, the value of the fields at which they are for ed, and the magnitude of the extrema all w one to evaluate the strain accumulated i a cyclically loaded product. It has been demonstrated that, as the number of zero-to-tension cycle grows, the field dependences of the longitudinal and transverse magnetostrictions of the steel behave the same way as under static compression.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers Keywords: Cyclic loading; magnetostriction; coercive force; attached transducer; Keywords: Cyclic loading; magnetostriction; coercive force; attached transducer;

1. Introduction Material fatigue is the main reason for the destruction of machine parts and structural elements. Therefore, estimating the level of metal fatigue degradation is a crucial problem, which still remains unsolved despite the 1. Introduction Material fatigue is the main reason for the destruction of machine parts and structural elements. Therefore, estimating the level of metal fatigue degradation is a crucial problem, which still remains unsolved despite the

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 Th Author(s). Publis d by lsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers * Correspon ing a thor. Tel.: +7-912-2422-109; fax: +7-343-3745-330. E-mail address: us@imach.uran.ru * Corresponding author. Tel.: +7-912-2422-109; fax: +7-343-3745-330. E-mail address: us@imach.uran.ru

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.107