Show simple item record

dc.contributor.advisorRoven, Hans Jørgennb_NO
dc.contributor.advisorSkorpen, Kristian Grøttanb_NO
dc.contributor.advisorReiso, Oddvinnb_NO
dc.contributor.authorStedje, Thorstein Jacobsennb_NO
dc.date.accessioned2014-12-19T13:28:46Z
dc.date.available2014-12-19T13:28:46Z
dc.date.created2014-09-16nb_NO
dc.date.issued2014nb_NO
dc.identifier747512nb_NO
dc.identifierntnudaim:11880nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/249577
dc.description.abstractBy using rapid solidified aluminium as feedstock and a novel extrusion method, i.e. screw extrusion, it is possible to extrude aluminium continuously. Due to rapid solidification, the base material can have small grain size and super saturated solid solution in the as cast condition. Since consolidation of rapid solidified granules and particles is an inherent part of the screw extrusion process, conventional consolidation by compaction is redundant. This will give the possibility to extrude a high strength profile with less process steps than used commercially today.In this study commercially rapid solidified AA6061 is screw extruded at 530°C. The effects of post extrusion heat treatments are documented by microstructure analysis (OM, SEM) and strength (HV1, tensile tests) of the extruded profiles. Six different heat treatment procedures were conducted, e.g. two different T5 and four different T6 conditions.The results show that this process can give high strength even though the process is not fully optimized. The results from this work indicate that the age hardenability on T5 depends a lot on the quenching rate prior to extrusion. It is found that the solid solution heat treatment (SSHT) and age hardening both have positive and negative effect on microstructure and strength.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for materialteknologinb_NO
dc.titleCharacterization of Screw Extruded Rapid Solidified AA6061nb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber84nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap og teknologi, Institutt for materialteknologinb_NO


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record