Abstract
Abstract The eddy-current touch method of crack detection can size cracks from the changes in the characteristics of the lift-off curves. Results obtained for mild steel samples show accuracies better than those obtained with the ACPD method for crack depths of 5 mm and less. For materials, such as different types of steels, having not very dissimilar properties, a calibration block for one type can be used for another. This is advantageous with the testing of welds
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