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- Title
The influence of a combined strain-heat treatment on the features of electromagnetic testing of fatigue degradation of quenched constructional steel.
- Authors
Makarov, A.; Gorkunov, E.; Savrai, R.; Kogan, L.; Yurovskikh, A.; Kolobylin, Yu.; Malygina, I.; Davydova, N.
- Abstract
The possibilities of the magnetic and eddy-current methods for testing fatigue degradation during low-cycle loading of quenched steel 50 (0.51% C) that was subjected to a combined strain-heat treatment according to an optimal regime that included friction treatment with subsequent tempering at T = 350°C, were investigated. It is shown that for steel that was subjected to a combined nanostructuring treatment, the accumulation of a plastic strain under 'hard' cyclic loading can be tested using the coercimetric method and values of the residual magnetic induction on the major and minor magnetic-hysteresis loops, values of the maximum and initial magnetic permeabilities, and readings of an eddy-current instrument at a low excitation frequency of the eddy-current transducer. The appearance of surface fatigue cracks can be tested via eddy-current measurements at high frequencies, when the contribution of the crack formation in the hardened layer to the eddy-current characteristics is considerable.
- Subjects
MAGNETIC properties of steel; STEEL defects; ELECTROMAGNETIC compatibility measurement; QUENCHED disorder (Quantum mechanics); EDDY current testing; PREVENTION
- Publication
Russian Journal of Nondestructive Testing, 2013, Vol 49, Issue 12, p690
- ISSN
1061-8309
- Publication type
Article
- DOI
10.1134/S1061830913120048