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Defect depth estimation using pulsed eddy current with varied pulse width excitation

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1784/insi.2009.51.2.69
AuthorSearch for: 1; Search for: 2; Search for: 2; Search for: 2
Affiliation
  1. National Research Council Canada. NRC Institute for Aerospace Research
  2. Newcastle University, UK
FormatText, Article
ConferenceThe British Institute of Non-Destructive Testing 2008 Conference, september 15-18, 2008, Cheshire, UK
Subjectpulse eddy current; metal-loss; corrosion; pulse width; duty cycle
Abstract
Current industry requirements demand defect quantification rather than simple defect detection. Besides the defect geometrical size, its depth location plays a critical role for the integrity of a structure and the safe life operation of the overall assembly. It has been long known that pulsed eddy current (PEC) non-destructive testing (NDT) for electrically conductive materials has the advantage of gathering different depth information in a single excitation process. This fact is due to the low frequencies found in the pulse spectrum that is used for the excitation of the driving coil; however, quantifying the defect depth still remains a challenge. This study considers different pulse widths and frequency components as a method of defect depth discrimination with direct applications in the evaluation of corrosion defects in multi-layer aircraft structures. Experimental testing and numerical modelling approaches are concomitantly discussed as ways of defect depth quantification.
Publication date
PublisherThe British Institute of Non-Destructive Testing
Access condition
  • available
  • unclassified
  • unlimited
In
  • Insight - Non-Destructive Testing and Condition Monitoring 51, no. 2 (1 February 2009): 69–72.
LanguageEnglish
Peer reviewedYes
NRC numberSMPL-2008-0139
NPARC number8926710
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Record identifier8cc44cb7-d7b8-40bd-8588-475cd43ae312
Record created2009-04-23
Record modified2023-04-19
Date modified: