Work-Hardening and Recovery Studies of Pure Aluminium.

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dc.contributor.authorOjediran, Surajudeen Oluwafemi
dc.contributor.otherAjaja., O.
dc.date.accessioned2014-08-26T13:59:40Z
dc.date.accessioned2018-10-29T11:21:06Z
dc.date.available2014-08-26T13:59:40Z
dc.date.available2018-10-29T11:21:06Z
dc.date.issued1985
dc.degree.awardM.Sc. Engineering Physicsen_US
dc.departmentPhysicsen_US
dc.description.abstractThe effects of work-hardening and recovery on the strength of pure aluminium have been investigated. The modes of interaction of these two processes during creep deformation were closely examined. The Bailey-Orowan equation was derived without recourse to a mechanical equation of state. This new method of derivation clearly showed that the Bailey-Orowan equation is applicable only to steady-state but not to transient creep deformation. The results of recovery tests performed on prestrained samples showed that the flow stress decreased with recovery time, eventually approaching an asymptotic value which was appreciably higher than the flow stress of the annealed sample. It was demonstrated that the recovery rate was not a unique function of the instantaneous dislocation density. Stress increment and stress removal (state recovery) tests performed on the creeping samples showed the generation of appreciable instantaneous plastic strains during the stress hike, and high strain rates following recovery. Both of these observations are consistent with the promise that creep is recovery-controlled in this material.en_US
dc.facultiesScienceen_US
dc.format.filetypepdfen_US
dc.identifier.citationAPAen_US
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/3536
dc.language.isoenen_US
dc.pages.totalpages89pen_US
dc.publisherObafemi Awolowo Universityen_US
dc.subjectAluminiumen_US
dc.subjectwork-hardeningen_US
dc.subjectBailey-Orowan equationen_US
dc.subjecttransient creep deformationen_US
dc.subjectasymptotic valueen_US
dc.subjectrecovery rateen_US
dc.titleWork-Hardening and Recovery Studies of Pure Aluminium.en_US
dc.typeThesisen_US
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