Onset of fretting corrosion in biomedical implants: surface roughness evolution under contact loads and corrosive environment

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dc.contributor.author Ryu, Jae-Joong
dc.contributor.department Mechanical Engineering
dc.date 2020-11-09T01:28:51.000
dc.date.accessioned 2021-02-26T08:59:58Z
dc.date.available 2021-02-26T08:59:58Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 2005
dc.date.issued 2005-01-01
dc.description.abstract <p>Fretting corrosion of orthopedic implants leads to surface failures that induce a cascade of biocompatibility problem like inflammation and even osteolysis. At the interfaces of modular implant components femoral head-neck taper connection, surfaces are subjected to cyclic contact loadings and micro scale frictional sliding in a corrosive environment. For understanding this fretting corrosion process, multiple asperity contact experiments are conducted to characterize roughness evolution due to the combination of contact loadings and corrosion. Cobalt-chromium-molybdenum specimens with patterned surface by machining are subjected to alternating sequence of contact loading and accelerated corrosion tests. The experimental measurement of surface roughness is used to determine the roughness evolution procedure during combined influence of contact loading and corrosive environment. A roughness evolution mechanism that incorporates contact-induced residual stress development and stress-assisted dissolution is proposed to elucidate the measured surface deformation.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/20885/
dc.identifier.articleid 21884
dc.identifier.contextkey 20115354
dc.identifier.doi https://doi.org/10.31274/rtd-20201107-442
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/20885
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/98252
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/20885/Ryu_ISU_2005_R98.pdf|||Fri Jan 14 22:29:40 UTC 2022
dc.subject.keywords Mechanical engineering
dc.title Onset of fretting corrosion in biomedical implants: surface roughness evolution under contact loads and corrosive environment
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
thesis.degree.discipline Mechanical Engineering
thesis.degree.level thesis
thesis.degree.name Master of Science
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