Effect of natural aging on RT and HSR superplasticity of ultrafine grained Zn-22Al alloy

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dc.authorid56405308400
dc.authorid6505883105
dc.authorid56031830800
dc.authorid56088826000
dc.authorid56068835900
dc.contributor.authorDemirtas M.
dc.contributor.authorPurcek G.
dc.contributor.authorYanar H.
dc.contributor.authorZhang Z.
dc.contributor.authorZhang Z.-F.
dc.date.accessioned20.04.201910:49:12
dc.date.accessioned2019-04-20T21:43:43Z
dc.date.available20.04.201910:49:12
dc.date.available2019-04-20T21:43:43Z
dc.date.issued2016
dc.departmentBayburt Üniversitesien_US
dc.description12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015
dc.description.abstractZn–22Al alloy was processed using a well-designed two-step equal channel angular extrusion/pressing (ECAE/P), and ultrafine-grained (UFG) microstructure with 200 nm grain size was achieved. UFG Zn-22Al was subjected to long-term (up to 60 days) aging at room temperature (RT) and it was seen that natural aging caused limited grain growth in the microstructure. Grain sizes of about 300 nm, 350 nm and 350 nm were measured after 15, 30 and 60 days aging, which mean that UFG Zn-22Al alloy has a good microstructural stability at RT up to 60 days. ECAPed Zn-22Al alloy showed a maximum elongation of about 400% at a high strain rate of 5×10-2 s-1 and maximum elongation decreased with increasing grain size. Elongation to failures of ~375% and ~350% were obtained with the samples having 300 nm and 350 nm grain sizes, respectively. In addition, natural aging slightly decreased the strain rate at which superplastic region formed. While the maximum elongation occurred at the strain rate of 5×10-2 s-1 in ECAPed UFG alloy, it took place at lower strain rate of 1×10-2 s-1 after aging for all time periods. Also, flow stress of the alloy increased with increasing grain size during natural aging. © 2016 Trans Tech Publications, Switzerland.en_US
dc.identifier.doi10.4028/www.scientific.net/MSF.838-839.320
dc.identifier.endpage325
dc.identifier.isbn9.78304E+12
dc.identifier.issn0255-5476
dc.identifier.scopus2-s2.0-84958093558en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage320
dc.identifier.urihttps://dx.doi.org/10.4028/www.scientific.net/MSF.838-839.320
dc.identifier.urihttps://hdl.handle.net/20.500.12403/659
dc.identifier.volume838-839
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTrans Tech Publications Ltd
dc.relation.ispartofMaterials Science Forumen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectHigh strain rate superplasticity
dc.subjectNatural aging
dc.subjectUltrafine-grained materials
dc.subjectZn–22Al alloy
dc.subjectAluminum
dc.subjectElongation
dc.subjectExtrusion
dc.subjectGrain growth
dc.subjectGrain size and shape
dc.subjectMicrostructure
dc.subjectSuperplasticity
dc.subjectZinc
dc.subjectElongation to failure
dc.subjectEqual channel angular extrusion
dc.subjectHigh-strain-rate superplasticity
dc.subjectMicrostructural stability
dc.subjectNatural aging
dc.subjectUltra fine grained microstructure
dc.subjectUltra-fine-grained
dc.subjectUltrafine grained materials
dc.subjectStrain rate
dc.subjectHigh strain rate superplasticity
dc.subjectNatural aging
dc.subjectUltrafine-grained materials
dc.subjectZn–22Al alloy
dc.subjectAluminum
dc.subjectElongation
dc.subjectExtrusion
dc.subjectGrain growth
dc.subjectGrain size and shape
dc.subjectMicrostructure
dc.subjectSuperplasticity
dc.subjectZinc
dc.subjectElongation to failure
dc.subjectEqual channel angular extrusion
dc.subjectHigh-strain-rate superplasticity
dc.subjectMicrostructural stability
dc.subjectNatural aging
dc.subjectUltra fine grained microstructure
dc.subjectUltra-fine-grained
dc.subjectUltrafine grained materials
dc.subjectStrain rate
dc.titleEffect of natural aging on RT and HSR superplasticity of ultrafine grained Zn-22Al alloyen_US
dc.typeConference Objecten_US

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