Eddy-Current Modeling of a Continous Conductivity Profile Resulting From a Diffusion Process

Type Article
Date 2011-08
Language English
Author(s) Lambert Marc1, Nouguier FredericORCID2, Zorgati Riadh3
Affiliation(s) 1 : Univ Paris Sud, Dept Rech Elect, Lab Signaux & Syst, SUPELEC,CNRS,UMR 8506, F-91192 Gif Sur Yvette, France
2 : Ctr Brest, Lab Oceanog Spatiale IFREMER, F-29280 Plouzane, France
3 : EDF Rech & Dev OSIRIS, F-92141 Clamart, France
Source Ieee Transactions On Magnetics (0018-9464) (Ieee-inst Electrical Electronics Engineers Inc), 2011-08 , Vol. 47 , N. 8 , P. 2093-2099
DOI 10.1109/TMAG.2011.2128877
WOS© Times Cited 3
Keyword(s) Coils, eddy current testing, electrical conductivity measurement, inverse problems, probes
Abstract This paper deals with the modelization of eddy-current measurements over combustion turbine blade coatings affected by depletion of aluminum. First, we model the response of an eddy-current coil over a layered metallic structure with a top over-aluminized coating by extending the analytical Uzal-Rose's model for one hyperbolic tangent conductivity profile to a conductivity profile using two hyperbolic tangents for taking inward and outward depletion of aluminum inside the coating into account. Results obtained with this model are similar to those obtained with a numerical multilayer model but with a reduced computing time.
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