Go to  Advanced Search

Aging behavior of flexcast® Al-Mg alloys with Sc and Zr additions

Show simple item record

dc.contributor.author Sohi, Mojan
dc.date.accessioned 2012-08-03T19:45:25Z
dc.date.available 2012-08-03T19:45:25Z
dc.date.copyright 2012 en_US
dc.date.issued 2012-08-03
dc.identifier.uri http://hdl.handle.net/2429/42868
dc.description.abstract AA5xxx series Al alloys have presented great potential in recent decades for packaging and automotive applications. A recent further development of these alloys has been the addition of Sc and Zr. The presence of these elements is known to develop strengthening phases that also influence other metallurgical phenomena such as recovery and recrystallization. However, the low solubility of both Sc and Zr in Al requires high cooling rates during casting in order to attain a supersaturated solid solution which conventional DC casting is unable to achieve. In this study, two Al- 3%Mg alloys, one Sc-free and the other containing 0.4% Sc were cast using the Flexcaster® available at the Novelis Global Technology Center (Kingston, Ontario). The Flexcaster® is a strip casting technology that transforms liquid aluminum into a directly rollable cast ingot that is not subject to scalping or homogenization processing. This technology is characterized by relatively high solidification and cooling rates. Aging experiments were performed on as-cast and cold-rolled samples of the two alloys to study the evolution of strengthening phases and their impact on recovery and recrystallization. Both alloys were artificially aged following casting at 200, 300 and 400°C for times ranging from 30s to 72 hours. The alloys were characterized by hardness and tensile tests and electrical resistivity measurements as well as optical and electron microscopy in order to monitor the aging behavior of the alloys. Results show enhanced strengthening in the Sc-containing alloy and superior high temperature microstructural stability in comparison to the Sc-free alloy as well as conventionally cast AlMgSc alloys. en_US
dc.language.iso eng en_US
dc.publisher University of British Columbia en
dc.rights Attribution-NonCommercial 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ *
dc.title Aging behavior of flexcast® Al-Mg alloys with Sc and Zr additions en_US
dc.type Electronic Thesis or Dissertation en
dc.degree.name Master of Applied Science - MASc en_US
dc.degree.discipline Materials Engineering en_US
dc.degree.grantor University of British Columbia en
dc.date.graduation 2012-11 en_US
dc.degree.campus UBCV en_US
dc.description.scholarlevel Graduate en


Files in this item

Files Size Format Description   View
ubc_2012_fall_sohi_mojan.pdf 60.42Mb Adobe Portable Document Format   View/Open
 

This item appears in the following Collection(s)

Show simple item record

All items in cIRcle are protected by copyright, with all rights reserved.

Attribution-NonCommercial 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial 2.5 Canada

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893