Features of Eddy-Current Tests of Stepped Axial Bores in Rotors of Turbines of Thermal Power Plants
Source abstract
Abstract
The paper reports on an investigation of parameters of the applied eddy-current transducer output in the presence of a cylindrical cavity with crack-like discontinuities and an interfering factor in the form of steps, i.e., local variations in the bore diameter. It has proven to be difficult to distinguish between a crack and a step when the recorded parameter is the signal amplitude; the method based on two parameters (amplitude and phase) allows one to get round the difficulties caused by the interfering factor.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Non-Destructive Testing Techniques · Material Properties and Failure Mechanisms · Engineering Diagnostics and Reliability
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References (6)
Show source-provided references
1. Volkov, B.I. and Temryukh, V.M., Complex Tests of Metal in Turbine Rotors in Axial Bore Surfaces, in Povyshenie nadezhnosti i effektivnosti raboty teplotekhnicheskogo oborudovaniya TES (Improving Reliability and Efficiency of Thermal Facilities of Thermal Power Plants), Chelyabinsk: TOO Riko, 1996, pp. 108-117.
2. Volkov, B.I., Temryukh, V.M., and Raevskii, M.A., Developing Instruments for Automatic Testing and Diagnostic of High-Power Devices, 15-ya rossiiskaya nauchno-tekhnicheskaya konferentsiya “Nerazrushayushchii kontrol' i diagnostika”-Tezisy dokl. (Abstracts of 15th Russian Conf. on Nondestructive Testing and Diagnostics), vol. 1, 1999.
3. Volkov, B.I., Eddy-Current Flaw Detector with Rotating Core in Applied Transducer, Defektoskopiya, 1986, no. 4, pp. 64-69.
4. Volkov, B.I. and Agafonov, V.A., Investigation of Resolution Parameters of an Eddy-Current Transducer with Conic Core, Defektoskopiya, 1983, no. 5, pp. 11-15.
5. Gerasimov, V.G., Pokrovskii, A.D., and Sukhorukov, V.V., Nerazrushayushchii kontrol'. Kn. 3. Elektromagnitnyi kontrol' (Nondestructive Testing. Book 3. Electromagnetic Testing), Moscow: Vysshaya Shkola, 1992, pp. 213-215.
6. Volkov, B.I. and Temryukh, V.M., VAK-2 Eddy-Current Instrument for Assessing Damage Due to Corrosion between Crystallites in Metal of Superheater Pipes of Thermal Power Plants, Defektoskopiya, 1998, no. 3, pp. 32-36.