ECT probe improvement for in-service non-destructive testing on conductive materials

The paper proposes the improvement of a measurement probe for Eddy Current Non-Destructive Testing (EC-NDT) applied to the defect investigation on conductive materials. The aim is to increase the defect detection sensitivity in order to investigate very small and sub-superficial defect The paper describes the probe realization and evaluates the probe performance also in comparison with the previous realized ECT probe. The probe performance characterization has been carried out both in simulation and real environments. In detail, as for the real tests, two aluminum plates with 5mm and 1mm subsuperficial cracks have been considered.