Comparison of the Artificial Reflector Inspection Using Conventional TOFD Probe and Phased Array TOFD Probe

A mechanized phased array UT system and a conventional multi-probe UT system were employed on an AUT calibration block to find the difference of artificial reflector inspection between phased array TOFD probe and conventional TOFD probe. After reviewed the TOFD images from the TOFD sharp-angled notch, transverse notch and center notch in the block, obverse advantage was found for the multi-probe UT system with a conventional TOFD probe beyond the mechanized phased array UT system with a phased array TOFD probe. Therefore, a mechanized UT system equipped with a conventional TOFD probe is the best configuration.