S. M. Zadvorkin, V. P. Shveikin, S. T. Kalashnikov, N. P. Antenorova

ON THE APPLICABILITY OF ELECTROMAGNETIC TESTING METHODS TO DETECTING DISCONTINUITIES IN STEEL STRUCTURES INTENDED FOR OPERATION IN AGGRESSIVE MEDIA UNDER EXTREME LOADS

Model specimens in the form of rings made of high-strength corrosion resistance steel (09Kh16N4B-Sh) are tested for corrosion under voltage in order to produce artificial defects in the form of corrosion pits and surface cracks. The specimens served to test the effectiveness of the magnetic particle, ferroprobe and eddy current testing techniques for detecting discontinuities in high-duty products made of the steel under study. The study has shown that magnetic particle testing by the applied field method, the ferroprobe and eddy current techniques offer a reliable detection of defects in the form of regions of pit corrosion and surface cracks on products made of the 09Kh16N4B steel. All the three techniques enable one to locate defects and estimate their sizes.

Acknowledgment: The equipment of the Plastometriya collective use center affiliated to the IES UB RAS was used in the research. The work was supported by the Comprehensive Program of UB RAS (Basic Research Targeted at Hi-Tech Scientific and Industrial Enterprises), project No.18-11-1-11 Development of Models of the Degradation of the Functional Properties of Materials for Rocket Equipment Sub-jected to Long-Term Storage and Operation.

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