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Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

dc.date.accessioned2020-08-28T09:27:58Z
dc.date.available2020-08-28T09:27:58Z
dc.date.issued2020-07-03
dc.identifierdoi:10.17170/kobra-202008261653
dc.identifier.urihttp://hdl.handle.net/123456789/11743
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kasselger
dc.language.isoengeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjecthigh strength aluminumeng
dc.subjectthermo-mechanical processingeng
dc.subjectmicrostructureeng
dc.subjecthigh temperature deformationeng
dc.subject.ddc600
dc.titlePerformance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Propertieseng
dc.typeAufsatz
dcterms.abstractThis study focuses on the high temperature characteristics of thermo-mechanically processed AA7075 alloy. An integrated die forming process that combines solution heat treatment and hot forming at different temperatures was employed to process the AA7075 alloy. Low die temperature resulted in the fabrication of parts with higher strength, similar to that of T6 condition, while forming this alloy in the hot die led to the fabrication of more ductile parts. Isothermal uniaxial tensile tests in the temperature range of 200–400 °C and at strain rates ranging from 0.001–0.1 s−1 were performed on the as-received material, and on both the solution heat-treated and the thermo-mechanically processed parts to explore the impacts of deformation parameters on the mechanical behavior at elevated temperatures. Flow stress levels of AA7075 alloy in all processing states were shown to be strongly temperature- and strain-rate dependent. Results imply that thermo-mechanical parameters are very influential on the mechanical properties of the AA7075 alloy formed at elevated temperatures. Microstructural studies were conducted by utilizing optical microscopy and a scanning electron microscope to reveal the dominant softening mechanism and the level of grain growth at elevated temperatures.eng
dcterms.accessRightsopen access
dcterms.creatorSajadifar, Seyed Vahid
dcterms.creatorScharifi, Emad
dcterms.creatorWeidig, Ursula
dcterms.creatorSteinhoff, Kurt
dcterms.creatorNiendorf, Thomas
dc.relation.doidoi:10.3390/met10070884
dc.subject.swdAluminiumger
dc.subject.swdThermomechanische Behandlungger
dc.subject.swdMikrostrukturger
dc.subject.swdHochtemperaturverhaltenger
dc.subject.swdDeformationger
dc.type.versionpublishedVersion
dcterms.source.identifierEISSN 2075-4701
dcterms.source.issueIssue 7
dcterms.source.journalMetalseng
dcterms.source.pageinfo884
dcterms.source.volumeVolume 10
kup.iskupfalse


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