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

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dc.authorid0000-0002-9378-3870en_US
dc.contributor.authorDemirtas, M.
dc.contributor.authorYanar, H.
dc.contributor.authorSaray, Onur
dc.contributor.authorPurcek, G.
dc.date.accessioned2021-03-20T20:27:00Z
dc.date.available2021-03-20T20:27:00Z
dc.date.issued2018
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description13th International Conference on Superplasticity in Advanced Materials, ICSAM 2018 -- 19 August 2018 through 22 August 2018 -- -- 216659en_US
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.description.sponsorshipKaradeniz Teknik Üniversitesi, KTU: 10501en_US
dc.description.sponsorshipThis research was supported by Scientific Research Projects of Karadeniz Technical University, Turkey, under Grant no: 10501.en_US
dc.identifier.doi10.4028/www.scientific.net/DDF.385.72en_US
dc.identifier.endpage77en_US
dc.identifier.isbn9783035713459
dc.identifier.issn1012-0386
dc.identifier.scopus2-s2.0-85052746231en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage72en_US
dc.identifier.urihttp://doi.org/10.4028/www.scientific.net/DDF.385.72
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1393
dc.identifier.volume385 DDFen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorSaray, Onur
dc.language.isoenen_US
dc.publisherTrans Tech Publications Ltden_US
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 pressingen_US
dc.subjectRoom temperature superplasticityen_US
dc.subjectZn-Al alloysen_US
dc.titleRoom temperature superplasticity in fine/ultrafine-grained Zn-Al alloys with different phase compositionsen_US
dc.typeConference Objecten_US

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