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

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.

Keyword(s)

Coils, eddy current testing, electrical conductivity measurement, inverse problems, probes

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Lambert Marc, Nouguier Frederic, Zorgati Riadh (2011). Eddy-Current Modeling of a Continous Conductivity Profile Resulting From a Diffusion Process. Ieee Transactions On Magnetics. 47 (8). 2093-2099. https://doi.org/10.1109/TMAG.2011.2128877, https://archimer.ifremer.fr/doc/00043/15424/

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