Affiliations: [a] School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China | [b] Institute of Agricultural Machinery, Hubei University of Technology, Wuhan, Hubei, China | [c] China Ship Scientific Research Center, Wuxi, Jiangsu, China | [d] Wuhan Marine Machinery Plant Co., Ltd., Wuhan, Hubei, China
Correspondence:
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Corresponding author: Yanhua Sun, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China. E-mail:sunyanhua@mail.xjtu.edu.cn
Abstract: In this paper, pulsed electric flux leakage (PEFL), a new
electromagnetic (EM) non-destructive testing (NDT) technique, is introduced.
The inspection principle, which is to evaluate defects in metallic
components carrying pulse current, was briefly described. Physical
experiments with a prototype capacitive probe were carried out. Effects of
through-hole diameter of the stainless specimen, surface-crack depth and
sub-surface crack inspection were studied. The proof-of-concept results
indicated that the PEFL testing method could be used to detect not only the
surface defects but also the sub-surface defects, and of complete
feasibility and the potential of great practical value as a supplement of
conventional NDT methods.
Keywords: Electric field, coplanar capacitor, pulsed electric flux leakage, pulse current
