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The magneto-elastoplastic coupling effect on the magnetic flux leakage signal
Journal of Magnetism and Magnetic Materials, 2020Abstract This paper introduces an experimental progress of the magneto-elastoplastic coupling phenomenon on magnetic flux leakage signal for ferromagnetic materials. The magnetic flux leakage signal on the surface of medium carbon steel was measured under the combined action of elastic load and plastic deformation.
Pengpeng Shi +2 more
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Invariance transformations for magnetic flux leakage signals
IEEE Transactions on Magnetics, 1996Magnetic flux leakage (MFL) methods are used extensively for inspecting ferromagnetic materials. The analysis of the MFL signal is however fraught with problems associated with the sensitivity of the signal to a number of factors such as the MFL sensor velocity and variations in the permeability of the test specimen.
S Mandayam, L Udpa, S S Udpa
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A Basic Signal Analysis Approach for Magnetic Flux Leakage Response
IEEE Transactions on Magnetics, 2018Magnetic flux leakage (MFL) response predicting is important for defect estimation. This paper first proposes a concept of basic signal by discovering the combination property of the MFL response. The basic signal can be used to predict the MFL response conveniently by a basic signal combination method (BSCM), which is also innovatively put forward in ...
Songling Huang, Lisha Peng, Shen Wang
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Variation of the stress dependent magnetic flux leakage signal with defect depth and flux density
NDT and E International, 1996Abstract The effects of uniaxial stress on the normal (radial) component of the magnetic flux leakage (MFL) signal induced by blind-hole defects for depths of 25%, 50% and 75% of the thickness of the pipe wall were investigated with a pipe wall flux density of 1.24 T.
Thomas W Krause, David L Atherton
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A study of magnetic flux-leakage signals
Journal of Physics D: Applied Physics, 1998Magnetic flux-leakage (MFL) measurement is the most widely used non-destructive technique for in-service inspection of oil and gas pipelines. The effect of line-pressure-induced hoop stress on MFL signals has been studied for an electrochemically milled pit (50% penetration) in a 9 mm thick steel pipe wall.
K Mandal, D L Atherton
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A model for magnetic flux leakage signal predictions
Journal of Physics D: Applied Physics, 2003An analytical model was developed to determine the length of a surface-breaking defect along the direction of the applied field when using the magnetic flux leakage (MFL) non-destructive technique. The theoretical model fits the experimental MFL results from simulated defects.
Catalin Mandache, Lynann Clapham
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Importance of Magnetizing Field on Magnetic Flux Leakage Signal of Defects
IEEE Transactions on Magnetics, 2018The measurement of magnetic flux leakage (MFL) is widely used as a non-destructive technique for inspecting oil and gas pipelines. In this method, many factors can affect the MFL signal, but the magnetization of the pipeline is a fundamental issue that bears consideration.
Hong Quang Pham +3 more
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Research on magnetic flux leakage signal characteristics of hard spot
Measurement: Journal of the International Measurement ConfederationHao Geng
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