Barkhausen Demodulation Ortquist, B. Hayford, D. 2018-02-14T06:01:00.000 2020-06-30T06:42:58Z 2020-06-30T06:42:58Z Sun Jan 01 00:00:00 UTC 1995 1995
dc.description.abstract <p>A careful examination of the magnetization of a ferromagnetic material reveals that it is a discontinuous process; when subject to a varying magnetic field, a ferromagnetic material is magnetized in discrete bursts as domain boundaries overcome pinning at defects in the crystal lattice. This discrete behavior manifests itself as high frequency “noise” superimposed upon a measurement of magnetic flux and is commonly referred to as the Barkhausen Effect. Several important microstructural properties of steel also depend on lattice defect structure, i.e., mechanical hardness, ferrite content, material fatigue, and internal stress state, and investigators have successfully correlated Barkhausen Effect parameters with these properties [1–3]. Unfortunately, Barkhausen noise signals are broadband and weak, characteristics that often limit the utility of the Barkhausen Effect in NDE applications. In this paper, we will describe a phenomenon we call Barkhausen Demodulation, which provides a means of measuring Barkhausen noise that lends itself more readily to NDE investigations. Further, we will describe an experiment in which Barkhausen Demodulation was used to measure the hardness of X40 grade pipeline steel.</p>
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dc.identifier archive/
dc.identifier.articleid 2580
dc.identifier.contextkey 5800167
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1995/allcontent/219
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/|||Fri Jan 14 22:39:23 UTC 2022
dc.source.uri 10.1007/978-1-4615-1987-4_219
dc.title Barkhausen Demodulation
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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