Non-destructive examination using a flexible multi-coil eddy current probe for weld surfaces of core internal components of nuclear power plants

Mechanism study for directivity of TR probe when applying Eddy current testing to ferro-magnetic structural materials

“…Nishimizu [11,12] detected cracks in a non-ferromagnetic material using an arrayed multi-coil probe with two scanning angles and demonstrated that the sensitivity was affected by the two angles. Mohseni [13] investigated the scanning angle for a ferromagnetic material with a split D-probe and found that the signal amplitude varied with the scanning angle.…”