Abstract
This study proposes an eddy current testing (ECT) probe to detect flaws in finite thickness austenitic stainless-steel plates. In order to obtain the spatial magnetic field distribution and the detection sensitivity of the probe in different scanning directions, a 3D model of ECT is simulated. The detection ability of ECT probe is verified by experiment. To detect surface flaws and subsurface flaws, 2.0 kHz and 1.0 kHz are chosen as excitation frequencies respectively. In addition, the pick-up signal goes through the amplification circuit and the signal conditioning module to improve the signal-to-noise ratio. Finally, the experimental results are compared with those from numerical simulation. Both results show the ability of the probe to detect flaws in the austenitic stainless-steel plate.
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