A Comparison of Millimeter Wave and Eddy Current Detection of Surface Breaking Defects in Conducting Materials

摘要: The detection of surface breaking defects in conducting materials is an important aspect nondestructive evaluation (NDE). Eddy current NDE methods have been used effectively for the fatigue cracks and other flaws [1], however, a detracting characteristic that eddy transducer must be placed close proximity to test specimen. Since millimeter wave energy can propagate air does not require couplant, offers alternative technique with significant advantage stand off mode operation. Millimeter has shown effective at detecting small [2–3], some under study specimen thus suffer from same disadvantages as techniques. This paper compares capabilities on conventional NDE.