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2020 №01 (04) DOI of Article
10.37434/tdnk2020.01.05
2020 №01 (06)

Technical Diagnostics and Non-Destructive Testing 2020 #01
Technical Diagnostics and Non-Destructive Testing #1, 2020, pp. 45-50

Investigation of the impact of structural-phase transformations on the metal magnetic properties

A.V. Gruzevich1, D.L. Nikiforov2, D.A. Derecha4, Yu.B. Skirta3
1Tripolye TPS. 08720, Ukrainka, Obukhov District, Kyiv Region, Ukraine. E-mail: Gruzevich@bigmir.net
2PJSC «Tsentrenergo». 120/4 Kazatskaya Str., 03022, Kyiv, Ukraine.
3Institute of Magnetism of the NAS of Ukraine and MES of Ukraine. 36-b Acad. Vernadskii Blvd., 03142, Kyiv.
4NTUU «Igor Sykorsky Kyiv Polytechnic Institute», 57 Pobedi Prosp., 03056, Kyiv.

Data on interaction of phase, structural and magnetic properties of ferritic-pearlitic steel 12Kh1MF, both in the initial condition and after operation were obtained. It is shown that the highest intensity and magnitude of magnetic response variation are manifested in the metal of heating surface pipes, which have been in operation and have the structure different from the initial one. A possibility is presented of using the magnitude of jumplike changes of magnetic field intensity based on Barkhausen effect, in order to detect zones with inadmissible structural changes in the metal of the heating surfaces, as well as zones of maximum stress concentration, located in the risk zone. 8 Ref., 1 Tabl., 8 Fig.
Keywords: magnetic induction, structural-phase state, Barkhausen effect, heating surface, hysteresis

Received: 09.12.2019
Published: 12.02.2020

References

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