Development of non-destructive technique to examine weld area using eddy current

A plus (+) point eddy current test surface probe was designed for detecting the surface and subsurface flaws existing in the weld of the power plant components. A technique to measure the length of the flaw applying this probe was investigated. Experiments for the artificial defects such as the crack type notch and the flat bottom hole were conducted in order to evaluate the measurement characteristics of the detected flaw. It was shown that the eddy current test with the plus (+) point probe is applicable for surface inspection in stead of the conventional surface non-destructive tests such as the liquid penetrant test and the magnetic particle test