Recent advancement of electromagnetic nondestructive inspection technology in Japan

In this paper, the electromagnetic nondestructive testing (NDT) of present interest for research and industrial applications in Japan is described. Besides ac and pulsed eddy-current testing, magnetic flux leakage testing, passive magnetic flux leakage for characterization of material degradation, and various inversion techniques are presented. Both simulation and experimental results are used to demonstrate validity of the electromagnetic NDT methods.