Potential Drop Imaging Technique for Sensitive Nde of Small Surface Cracks
نویسندگان
چکیده
This paper reports the potential drop technique as an imaging tool for the clear identification and sensitive evaluation of very small surface cracks. The distributions of d-c potential drop around the surface cracks are obtained by scanning the closely coupled probes potential drop sensor, and a methodology for evaluating a 3-D crack from the potential drop profiles measured across and along the crack is developed. The capability of the potential drop imaging technique is clarified by demonstrating the evaluation of a real fatigue crack.
منابع مشابه
Advancement of the Closely Coupled Probes Potential Drop Technique for Nde of Surface Cracks
Abstract: DCPD technique is powerful tool for quantitative NDE of cracks. The technique using four probes which are in close proximity to each other has been proposed for NDE of surface cracks; that is the closely coupled probes potential drop (CCPPD) technique. It has been shown that the sensitivity of the CCPPD technique is enhanced significantly in comparison with the usual method. The objec...
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