Analytical approach to pulsed eddy current nondestructive evaluation of multilayered conductive structures

This paper proposes an analytical approach that can describe the Pulsed Eddy Current Testing (PECT) of stratified conductive structures by a single air-coil used for detecting and sizing of metal loss due to interlayer corrosion. Specifically for a single air-cored coil above a multilayered conducti...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2012, 26(12), , pp.3953-3958
Main Authors: Zhang, JianHai, Kim, Woong-Ji, Yuan, Maodan, Kim, Hak-Joon, Song, Sung-Jin, Lee, Chan-Woo, Chung, Jong-Duk
Format: Article
Language:English
Subjects:
Applied classical electromagnetism
Applied sciences
Coiling
Computer simulation
Control
Corrosion
Corrosion mechanisms
Cross-disciplinary physics: materials science
rheology
Dynamical Systems
Eddy current testing
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Engineering
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Industrial and Production Engineering
Materials science
Materials testing
Mathematical analysis
Mathematical models
Mechanical Engineering
Metals. Metallurgy
Nondestructive testing
Physics
Sizing
Structural steels
Vibration
기계공학
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Summary:This paper proposes an analytical approach that can describe the Pulsed Eddy Current Testing (PECT) of stratified conductive structures by a single air-coil used for detecting and sizing of metal loss due to interlayer corrosion. Specifically for a single air-cored coil above a multilayered conductive structure, the coil impendance response of the cylindrical eddy-current probe is calculated based on the truncated region eigenfunction expansion (TREE) method using the generalized matrix coefficients in series form. Analytical modeling of pulsed eddy current is developed using the Fourier series for multilayered conductive structures. A simulation study is carried out for demonstrating the capability of the proposed approach for sizing the metal loss in a two-layer specimen. Furthermore, the experiment is set up to confirm the simulating results of the analytical model for multilayered steels. Good agreement between the theoretical results and measured signals is observed.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-012-0911-8