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.
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