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dc.contributor.authorWhite, Steven Andrew
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2009-07-22 15:34:28.967en
dc.date.accessioned2009-07-22T21:29:25Z
dc.date.available2009-07-22T21:29:25Z
dc.date.issued2009-07-22T21:29:25Z
dc.identifier.urihttp://hdl.handle.net/1974/1994
dc.descriptionThesis (Ph.D, Physics, Engineering Physics and Astronomy) -- Queen's University, 2009-07-22 15:34:28.967en
dc.description.abstractA Barkhausen noise (BN) testing system was developed for the non-destructive evaluation (NDE) of residual stresses in CANDU reactor feeder pipes. The system consists of a four-channel arbitrary waveform flux control system (FCS), and the spring-loaded tetrapole prototype (SL4P) BN probe. The combination of the FCS and SL4P was shown to provide repeatable BN measurements on feeder pipe samples, with variations in air gaps between the SL4P poles and the sample from 0.43 mm to 1.29 mm, and typical pickup coil coupling uncertainties for the total BN energy from ±2% to ±7%. Precision for elastic strain estimation in feeder pipes was found to be between ±7 MPa and ±9 MPa in tension, depending on the excitation field configuration, and negligible in compression. Modelling of the BN penetration depth as a function of the excitation field was used to estimate the BN penetration depth between 5 μm at 300 kHz to a maximum of 500 μm at 3 kHz. The modelling, engineering, and procedures developed for this BN testing system provide an improved basis for the future advancement of BN testing, and ferromagnetic NDE in general.en
dc.format.extent36847962 bytes
dc.format.mimetypeapplication/pdf
dc.languageenen
dc.language.isoenen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectBarkhausen noiseen
dc.subjectCANDU feeder pipesen
dc.subjectferromagnetismen
dc.subjectmagnetic fluxen
dc.subjectanisotropyen
dc.subjectnon-destructive evaluationen
dc.subjectresidual stressen
dc.titleA Barkhausen Noise Testing System for CANDU Feeder Pipesen
dc.typethesisen
dc.description.degreePh.Den
dc.contributor.supervisorClapham, Lynannen
dc.contributor.supervisorKrause, Thomas W.en
dc.contributor.departmentPhysics, Engineering Physics and Astronomyen


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