Identification of Opposite Defects in Stainless Sheet Using ECT

Abstract

We performed experimental and numerical studies on identification of opposite side defects in stainless sheet using Eddy Current Testing (ECT). Measurement and simulation with the 2-D boundary element method (BEM) we carried out to evaluate the sensor signals for opposite side defects in test specimens. We tried to overcome the outer skin effect of input voltage by using multiple frequencies in the numerical approach.