Room temperature superplasticity in fine/ultrafine-grained Zn-Al alloys with different phase compositions

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dc.authorid56405308400
dc.authorid56031830800
dc.authorid16308023800
dc.authorid6505883105
dc.contributor.authorDemirtas M.
dc.contributor.authorYanar H.
dc.contributor.authorSaray O.
dc.contributor.authorPurcek G.
dc.date.accessioned20.04.201910:49:12
dc.date.accessioned2019-04-20T21:43:10Z
dc.date.available20.04.201910:49:12
dc.date.available2019-04-20T21:43:10Z
dc.date.issued2018
dc.departmentBayburt Üniversitesien_US
dc.description13th International Conference on Superplasticity in Advanced Materials, ICSAM 2018
dc.description.abstractThree Zn-Al alloys, namely Zn-22Al, Zn-5Al and Zn-0.3Al, were subjected to equal-channel angular pressing (ECAP), and the effect of ECAP on their microstructure and room temperature (RT) superplastic behavior were investigated in detail referring to previous studies reported by the authors of the current study. ECAP remarkably refined the microstructures of three alloys as compared to their pre-processed conditions. While the lowest grain size was achieved in Zn-22Al alloy as 200 nm, the grain sizes of Zn-5Al and Zn-0.3Al alloys were ~540 nm and 2 µm, respectively, after ECAP. After the formation of fine/ultrafine-grained (F/UFG) microstructures, all Zn-Al alloys exhibited superplastic behavior at RT and high strain rates. The maximum superplastic elongations were 400%, 520% and 1000% for Zn-22Al, Zn-5Al and Zn-0.3Al alloys, respectively. It is interesting to point out that the highest RT superplastic elongation was obtained in Zn-0.3Al alloy with the largest grain size, while Zn-22Al alloy having the lowest grain size showed the minimum superplastic elongation. This paradox was attributed to the different phase compositions of these alloys. The formation of Al-rich ?/? phase boundaries, where grain boundary sliding is minimum comparing to Zn-rich ?/? and ?/? phase boundaries of Zn-Al alloys, is the lowest level in Zn-0.3Al alloy among all the alloys. Therefore, it can be concluded that if it is desired to achieve high superplastic elongation in Zn-Al alloys at RT, keeping Al content at a possibly minimum level seems to be the most suitable way. © 2018 Trans Tech Publications, Switzerlanden_US
dc.identifier.doi10.4028/www.scientific.net/DDF.385.72
dc.identifier.endpage77
dc.identifier.isbn9.78304E+12
dc.identifier.issn1012-0386
dc.identifier.scopus2-s2.0-85052746231en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage72
dc.identifier.urihttps://dx.doi.org/10.4028/www.scientific.net/DDF.385.72
dc.identifier.urihttps://hdl.handle.net/20.500.12403/434
dc.identifier.volume385 DDF
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTrans Tech Publications Ltd
dc.relation.ispartofDefect and Diffusion Forumen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectEqual channel angular pressing
dc.subjectRoom temperature superplasticity
dc.subjectZn-Al alloys
dc.subjectAluminum alloys
dc.subjectBinary alloys
dc.subjectElongation
dc.subjectEqual channel angular pressing
dc.subjectGrain boundary sliding
dc.subjectGrain size and shape
dc.subjectMicrostructure
dc.subjectPhase composition
dc.subjectPressing (forming)
dc.subjectStrain rate
dc.subjectSuperplasticity
dc.subjectAl content
dc.subjectGrain size
dc.subjectHigh strain rates
dc.subjectLargest grain sizes
dc.subjectRoom-temperature superplasticity
dc.subjectSuperplastic behavior
dc.subjectSuperplastic elongation
dc.subjectZnAl alloy
dc.subjectZinc alloys
dc.subjectEqual channel angular pressing
dc.subjectRoom temperature superplasticity
dc.subjectZn-Al alloys
dc.subjectAluminum alloys
dc.subjectBinary alloys
dc.subjectElongation
dc.subjectEqual channel angular pressing
dc.subjectGrain boundary sliding
dc.subjectGrain size and shape
dc.subjectMicrostructure
dc.subjectPhase composition
dc.subjectPressing (forming)
dc.subjectStrain rate
dc.subjectSuperplasticity
dc.subjectAl content
dc.subjectGrain size
dc.subjectHigh strain rates
dc.subjectLargest grain sizes
dc.subjectRoom-temperature superplasticity
dc.subjectSuperplastic behavior
dc.subjectSuperplastic elongation
dc.subjectZnAl alloy
dc.subjectZinc alloys
dc.titleRoom temperature superplasticity in fine/ultrafine-grained Zn-Al alloys with different phase compositionsen_US
dc.typeConference Objecten_US

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