Basic studies on the eddy current examination of defects in Inconel, a typical nickel-base alloy used in the reactor vessel, pressurizer, and core internal of nuclear power plants, are carried out. The detecting and sizing capability of the eddy current method is investigated through analytical and experimental approaches. Probe’s detectability is numerically evaluated, and appropriate probe and examination conditions are correspondingly selected. The numerical signal calculation and crack reconstruction approach is confirmed in terms of the study of the eddy current examination of electrodischarge machining notches in Inconel base metal, and further applied to eddy current examination of fatigue cracks in Inconel welds. The profiles of fatigue cracks are reconstructed using eddy current testing signals. Crack depths estimated by eddy current reconstruction agree well with that of ultrasonic testing and are consistent with the crack depths revealed from destructive testing. The research presented in this paper shows that by choosing a proper testing situation, eddy current examination is feasible for detecting and sizing of surface-breaking cracks in Inconel welds.
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e-mail: cheng-weiying@japeic.or.jp
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February 2007
Research Papers
Eddy Current Examination of Fatigue Cracks in Inconel Welds
Weiying Cheng,
Weiying Cheng
NDE Centre,
e-mail: cheng-weiying@japeic.or.jp
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
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Ichiro Komura,
Ichiro Komura
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
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Mitsuharu Shiwa,
Mitsuharu Shiwa
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
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Shigeru Kanemoto
Shigeru Kanemoto
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
Search for other works by this author on:
Weiying Cheng
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japane-mail: cheng-weiying@japeic.or.jp
Ichiro Komura
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
Mitsuharu Shiwa
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, Japan
Shigeru Kanemoto
NDE Centre,
Japan Power Engineering and Inspection Corporation
, Benten-cho 14-1, Tsurumi-ku, Yokohama, Kanagawa 230-0044, JapanJ. Pressure Vessel Technol. Feb 2007, 129(1): 169-174 (6 pages)
Published Online: July 11, 2006
Article history
Received:
April 26, 2005
Revised:
July 11, 2006
Citation
Cheng, W., Komura, I., Shiwa, M., and Kanemoto, S. (July 11, 2006). "Eddy Current Examination of Fatigue Cracks in Inconel Welds." ASME. J. Pressure Vessel Technol. February 2007; 129(1): 169–174. https://doi.org/10.1115/1.2435718
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