Show simple item record

dc.contributor.advisorMcDowell, David L.
dc.contributor.authorSmith, Benjamin Daniel
dc.date.accessioned2013-10-21T20:27:30Z
dc.date.available2014-08-01T05:30:05Z
dc.date.created2013-08
dc.date.issued2013-06-25
dc.date.submittedAugust 2013
dc.identifier.urihttp://hdl.handle.net/1853/49237
dc.description.abstractTitanium alloys are employed in many advanced engineering applications due to their exceptional properties, i.e., a high strength-to-weight ratio, corrosion resistance, and high temperature strength. The performance of titanium alloys is known to be strongly affected by its inherent microstructure, which forms as a result of its thermo-mechanical processing. These microstructures produce compromise relationships between beneficial and detrimental effects on the alloy's performance. To study these structure-property relationships, two distinct crystal plasticity algorithms have been calibrated to data acquired from cyclic deformation experiments performed on three different Ti microstructures: (1) Ti-6Al-4V beta-annealed , (2) Ti-18 solution-treated, age-hardened (STA), and (3) Ti-18 beta-annealed, slow-cooled, age-hardened (BASCA). The calibrated models have been utilized to simulate fatigue loading of variant microstructures to investigate the influence of mean grain size, crystallographic texture, and phase volume fraction. The driving force for fatigue crack nucleation and propagation is quantified through the calculation of relevant fatigue indicator parameters (FIPs) and radial correlation functions are employed to study the correlation between favorably oriented slip systems and the extreme value FIP locations. The computed results are utilized to observe fatigue performance trends associated with changes to key microstructural attributes.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectTi-6Al-4V
dc.subjectTi-18
dc.subjectCrystal plasticity
dc.subjectFatigue
dc.subjectTitanium
dc.subjectDeformation
dc.subject.lcshMetals Fatigue
dc.subject.lcshTitanium alloys
dc.subject.lcshTitanium alloys Fatigue
dc.subject.lcshTitanium alloys Effect of high temperatures on
dc.titleMicrostructure-sensitive plasticity and fatigue of three titanium alloy microstructures
dc.typeThesis
dc.description.degreeM.S.
dc.contributor.departmentMechanical Engineering
dc.embargo.terms2014-08-01
thesis.degree.levelMasters
dc.contributor.committeeMemberNeu, Richard W
dc.contributor.committeeMemberPierron, Olivier N
dc.contributor.committeeMemberShih, Donald S
dc.date.updated2013-10-21T20:27:30Z


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record