The effects of ternary alloying additions on solute-drag creep in Al-Mg alloys

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dc.contributor.advisorTaleff, Eric M.en
dc.creatorQiao, Junen
dc.date.accessioned2011-07-13T21:08:08Zen
dc.date.available2011-07-13T21:08:08Zen
dc.date.issued2003-05en
dc.descriptiontexten
dc.description.abstractEffects of ternary additions of Zn, Fe, and Cu on solute-drag creep and duc tility in Al-Mg alloys are studied. The materials studied are, in wt. pct., Al 2Mg-5Zn, Al-3Mg-5Zn, Al-4Mg-5Zn, Al-3Mg-0.11Fe, Al-3Mg-0.27Fe, Al-3Mg 0.40Fe, Al-3Mg-0.50Cu, Al-3Mg-1.02Cu, Al-3Mg-1.52Cu, and Al-3Mg-2.15Cu. Experimental data show that ternary Zn additions do not have an adverse ef fect on solute-drag creep in Al-Mg alloys, but increase the sensitivity of stress exponent, n, to Mg content. Transitions to power-law breakdown in the Al xMg-5Zn materials are discussed. Ternary Fe and Cu additions increases n during solute-drag creep. Ductilities of over 100% are consistently achieved in the Al-xMg-5Zn and Al-3Mg-xFe materials. Age hardenability during natu ral aging and simulated paint-bake cycle are studied for the Al-xMg-5Zn and Al-3Mg-xCu materials. Zn creates a significant paint-bake response, while the effect of Cu is small for a simulated paint-bake cycle.
dc.description.departmentMaterials Science and Engineeringen
dc.format.mediumelectronicen
dc.identifier.urihttp://hdl.handle.net/2152/12362en
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.rights.restrictionRestricteden
dc.subjectTernary alloysen
dc.subjectAlloysen
dc.titleThe effects of ternary alloying additions on solute-drag creep in Al-Mg alloysen
thesis.degree.departmentMaterials Science and Engineeringen
thesis.degree.disciplineMaterials Science and Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen

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