New parameters for the ACFM inspection of different materials
Alternating current field measurement (ACFM) is a widely-used technique for the detection of defects in metals. In this paper, the influences of material type on signals are analysed to solve the crack sizing problem in the ACFM technique. A new parameter λ is defined to describe the signal variation among different materials. The simulation and experiment results show that along with the increase of λ, the sensitivity of the signal decreases, while the Bx variation of the signal remains roughly constant. The relationship between λ and Bx variation can be taken into account to reduce the crack sizing error in different materials.
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Document Type: Research Article
Publication date: June 1, 2016
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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