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dc.creatorCipywnyk, Harold Zenovien_US
dc.date.accessioned2010-07-19T07:26:19Zen_US
dc.date.accessioned2013-01-04T04:45:49Z
dc.date.available2011-07-19T08:00:00Zen_US
dc.date.available2013-01-04T04:45:49Z
dc.date.created1962en_US
dc.date.issued1962en_US
dc.date.submitted1962en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-07192010-072619en_US
dc.description.abstractIn the first part of this investigation, the Krouse rotating beam fatigue machine and the R. R. Moore rotating beam fatigue machine were compared. On the basis of determining the fatigue life of cold-­rolled steel at one stress level, it was found that there was no sig­nificant difference between the machines at the 1% significance level. Hand-polished and electro-polished fatigue specimens were tested on both machines. It was found that there was a significant difference between the effects on fatigue life due to the different finishes at the 1% significance level and that the electro-polished specimens affected a greater degree of scatter in the data than the electro-polished speci­mens. Also, fatigue cracks could be observed sooner on the electro-­polished specimens than on the hand-polished specimens. The ratio of cycles to crack to total life ranged from 0.69 for electro-polished specimens to 0.83 for hand-polished specimens. In the second part of this investigation, the study of the initiation of fatigue cracks on electro-polished specimens revealed that evidence of plastic deformation leading to the formation of a fatigue crack was visible as early as 1/4% of the total life of the specimen. Slip-lines which developed into micro-cracks were observed first. These micro-cracks later joined to form fatigue cracks.en_US
dc.language.isoen_USen_US
dc.titleEffects of surface finish on the fatigue life of "cold-rolled" mild steel specimensen_US
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberGarber, S.en_US
dc.contributor.committeeMemberMantle, J. B.en_US


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