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Features of Eddy-Current Tests of Stepped Axial Bores in Rotors of Turbines of Thermal Power Plants

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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.

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REFERENCES

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Authors and Affiliations

  1. OAO Ural Research Institute of Thermal Technologies, Chelyabinsk, Russia

    B. I. Volkov & V. M. Temryukh

  2. Moscow State Academy of Instrument Building and Information Technologies, Moscow, Russia

    P. N. Shkatov

Authors
  1. B. I. Volkov
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  2. V. M. Temryukh
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  3. P. N. Shkatov
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Volkov, B.I., Temryukh, V.M. & Shkatov, P.N. Features of Eddy-Current Tests of Stepped Axial Bores in Rotors of Turbines of Thermal Power Plants. Russian Journal of Nondestructive Testing 37, 621–626 (2001). https://doi.org/10.1023/A:1014935306021

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  • DOI: https://doi.org/10.1023/A:1014935306021

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