TY - JOUR
T1 - Evaluation of wall thinning defect in magnetic material based on PECT method under magnetic saturation
AU - Xie, Shejuan
AU - Tian, Mingming
AU - Chen, Hong En
AU - Zhao, Ying
AU - Wu, Lei
AU - Chen, Zhenmao
AU - Uchimoto, Tetsuya
AU - Takagi, Toshiyuki
N1 - Funding Information:
The authors would like to thank the National Magnetic Confinement Fusion Program of China (No. 2013GB113005), the Natural Science Foundation of China (No. 51407132, 51277139, 51577139) for funding. This work was partly supported by the Fundamental Research Funds for the Central Universities and the JSPS Core-to-Core Program, A. Advanced Research Networks, “International research core on smart layered materials and structures for energy saving”.
PY - 2017
Y1 - 2017
N2 - One of the major safety issues in nuclear power plants is pipe wall thinning where the pipe is mainly of magnetic material. Due to the large magnetic relative permeability of piping and the skin depth effect, the conventional PECT method is difficult for detecting the opposite side wall thinning. In this study, a pulsed eddy current testing (PECT) method under magnetic saturation was proposed and validated through numerical simulations and experiments. First, the mechanism of how magnetic saturation can increase the skin depth was studied through numerical simulation with help of COMSOL Multiphysics software. Second, the detection sensitivity of magnetic field signal and voltage signal for wall thinning defect of specimens with various magnetic permeability was investigated through numerical simulation. Finally, the experiments of magnetic saturation PECT were conducted, and the feasibility and superiority of the proposed magnetic saturation PECT method were demonstrated.
AB - One of the major safety issues in nuclear power plants is pipe wall thinning where the pipe is mainly of magnetic material. Due to the large magnetic relative permeability of piping and the skin depth effect, the conventional PECT method is difficult for detecting the opposite side wall thinning. In this study, a pulsed eddy current testing (PECT) method under magnetic saturation was proposed and validated through numerical simulations and experiments. First, the mechanism of how magnetic saturation can increase the skin depth was studied through numerical simulation with help of COMSOL Multiphysics software. Second, the detection sensitivity of magnetic field signal and voltage signal for wall thinning defect of specimens with various magnetic permeability was investigated through numerical simulation. Finally, the experiments of magnetic saturation PECT were conducted, and the feasibility and superiority of the proposed magnetic saturation PECT method were demonstrated.
KW - Magnetic material
KW - detection sensitivity
KW - experiment
KW - magnetic saturation PECT
KW - numerical simulation
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U2 - 10.3233/JAE-172257
DO - 10.3233/JAE-172257
M3 - Article
AN - SCOPUS:85031773070
VL - 55
SP - S49-S59
JO - International journal of applied electromagnetics in materials
JF - International journal of applied electromagnetics in materials
SN - 1383-5416
IS - S1
ER -