High temperature superplasticity and deformation behavior of naturally aged Zn-Al alloys with different phase compositions

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dc.authorid56405308400
dc.authorid56740005500
dc.authorid56031830800
dc.authorid6505883105
dc.contributor.authorDemirtas M.
dc.contributor.authorKawasaki M.
dc.contributor.authorYanar H.
dc.contributor.authorPurcek G.
dc.date.accessioned20.04.201910:49:12
dc.date.accessioned2019-04-20T21:43:03Z
dc.date.available20.04.201910:49:12
dc.date.available2019-04-20T21:43:03Z
dc.date.issued2018
dc.departmentBayburt Üniversitesien_US
dc.description.abstractTwo Zn-Al alloys, eutectoid Zn-22Al and dilute Zn-0.3Al, were processed through equal-channel angular pressing (ECAP). The ECAP-processed alloys were subjected to long-term natural aging at room temperature for 120 days in order to investigate the effect of long-term natural aging on high-temperature superplasticity and the deformation behavior of these alloys. The grain size of the Zn-22Al alloy increased from 200 nm after ECAP to 400 nm after the natural aging process. The Zn-0.3Al alloy with a grain size of 1.3 µm after ECAP demonstrated a reasonably stable microstructure with the grain size of ~ 1.7 µm after long-term natural aging. The naturally aged ultrafine-grained (UFG) Zn-22Al alloy showed an excellent superplastic elongation of about 1800% at 200 °C. Grain boundary sliding was determined as the dominant deformation mechanism in this alloy. On the contrary, a considerably low elongation to failure of 230% was recorded in the naturally aged fine-grained (FG) Zn-0.3Al alloy at 150 °C, and dislocation creep was evaluated as the main deformation mechanism for this alloy. Detailed microstructural analyses showed that the FG Zn-0.3Al alloy was exposed to grain boundary corrosion during the natural aging process due to the presence of Al precipitates at grain boundaries whereas such formation was not observed in the UFG Zn-22% Al alloy. Grain boundary sliding was hindered by grain boundary corrosion and the cavity nucleation at the corroded grain boundaries caused a premature failure leading to such a low elongation in the Zn-0.3Al alloy. © 2018 Elsevier B.V.en_US
dc.identifier.doi10.1016/j.msea.2018.05.104
dc.identifier.endpage83
dc.identifier.issn0921-5093
dc.identifier.scopus2-s2.0-85048504183en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage73
dc.identifier.urihttps://dx.doi.org/10.1016/j.msea.2018.05.104
dc.identifier.urihttps://hdl.handle.net/20.500.12403/369
dc.identifier.volume730
dc.identifier.wosWOS:000440118900010en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Ltd
dc.relation.ispartofMaterials Science and Engineering Aen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectEqual-channel angular pressing
dc.subjectGrain boundary corrosion
dc.subjectNatural aging
dc.subjectSuperplasticity
dc.subjectZn-Al alloys
dc.subjectAluminum corrosion
dc.subjectBinary alloys
dc.subjectCreep
dc.subjectElongation
dc.subjectEqual channel angular pressing
dc.subjectGrain boundary sliding
dc.subjectGrain size and shape
dc.subjectPressing (forming)
dc.subjectSuperplasticity
dc.subjectZinc alloys
dc.subjectDominant deformation mechanism
dc.subjectGrain boundary corrosions
dc.subjectHigh-temperature superplasticities
dc.subjectMicrostructural analysis
dc.subjectNatural aging
dc.subjectSuperplastic elongation
dc.subjectUltra-fine grained ( UFG)
dc.subjectZnAl alloy
dc.subjectAluminum alloys
dc.subjectEqual-channel angular pressing
dc.subjectGrain boundary corrosion
dc.subjectNatural aging
dc.subjectSuperplasticity
dc.subjectZn-Al alloys
dc.subjectAluminum corrosion
dc.subjectBinary alloys
dc.subjectCreep
dc.subjectElongation
dc.subjectEqual channel angular pressing
dc.subjectGrain boundary sliding
dc.subjectGrain size and shape
dc.subjectPressing (forming)
dc.subjectSuperplasticity
dc.subjectZinc alloys
dc.subjectDominant deformation mechanism
dc.subjectGrain boundary corrosions
dc.subjectHigh-temperature superplasticities
dc.subjectMicrostructural analysis
dc.subjectNatural aging
dc.subjectSuperplastic elongation
dc.subjectUltra-fine grained ( UFG)
dc.subjectZnAl alloy
dc.subjectAluminum alloys
dc.titleHigh temperature superplasticity and deformation behavior of naturally aged Zn-Al alloys with different phase compositionsen_US
dc.typeArticleen_US

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