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dc.contributor.advisorLiu, Stephen
dc.contributor.advisorOlson, D. L. (David LeRoy)
dc.contributor.authorPoncelow, Jonathan A.
dc.date.accessioned2018-01-04T18:09:10Z
dc.date.accessioned2022-02-03T13:01:31Z
dc.date.available2019-01-03T18:09:10Z
dc.date.available2022-02-03T13:01:31Z
dc.date.issued2017
dc.identifierPoncelow_mines_0052E_11393.pdf
dc.identifierT 8398
dc.identifier.urihttps://hdl.handle.net/11124/172011
dc.descriptionIncludes bibliographical references.
dc.description2017 Fall.
dc.description.abstractThis work serves to assess the viability of a nondestructive technique for the determi- nation of hydrogen in steel welds using variation in magnetic properties. To that end, the philosophical framework is established through a review of applicable theories and develop- ment of new models with regard to hydrogen mobility and ferromagnetism, where possible. Experimental methods and analytical algorithms are developed to determine variation in magnetoacoustic and Barkhausen emission character and changes in magnetization behav- ior. These techniques are then applied to a select number of low-alloy steel samples varied in microstructure by heat treatment and hydrogen concentration by electrolytic charging. Results of these tests are interpreted in the context of hydrogen trapping in ferrous metals and the impact of the solute on the ferromagnetic properties and magnetization dynamics of steel. Finally, the methods developed are evaluated for their robustness as nondestructive methods for hydrogen characterization in field and/or laboratory environments.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2010-2019 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjecthydrogen
dc.subjectnondestructive evaluation
dc.subjectBarkhausen noise
dc.subjectsteel
dc.subjectmagnetoacoustic emission
dc.titleDetermination of hydrogen in low alloy steel by magnetoacoustic emission and Barkhausen noise
dc.typeText
dc.contributor.committeememberDe Moor, Emmanuel
dc.contributor.committeememberYu, Zhenzhen
dc.contributor.committeememberSteele, John P. H.
dc.contributor.committeememberVidal, Edgar E.
dc.contributor.committeememberMeegan, Douglas
dcterms.embargo.terms2019-01-03
dcterms.embargo.expires2019-01-03
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.degree.levelDoctoral
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines
dc.rights.accessEmbargo Expires: 01/03/2019


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