Improvement of formability of ultrafine-grained materials by post-SPD annealing

Basit Öğe Kaydı
dc.authorid0000-0002-9378-3870en_US
dc.contributor.authorSaray, Onur
dc.contributor.authorPurcek, G.
dc.contributor.authorKaraman, I.
dc.contributor.authorMaier, H. J.
dc.date.accessioned2021-03-20T20:15:24Z
dc.date.available2021-03-20T20:15:24Z
dc.date.issued2014
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractUltrafine-grained (UFG) IF-steel, as an example of an essentially single phase UFG microstructure, was annealed at different temperatures and time intervals in order to improve its formability by achieving a good strength-ductility-formability balance. In general, annealing increased the ductility and formability of UFG steel. Annealing at temperatures inside the recovery region caused a limited improvement in the formability of UFG steel due to the relief of internal energy without considerable grain coarsening. As the grain size increased to above 4 mu m by annealing at temperatures inside the partially recrystallization region, the formability of UFG steel in the uniform region increased considerably, and localized deformation with early necking changed to a homogeneous mode as revealed by increased uniform thinning and enlargement of the membrane straining regime. Further grain coarsening resulted in a slight increase in uniform elongation both in uniaxial and biaxial tests. The UFG microstructure reduced the roughness of the free surface of biaxially stretched samples by decreasing the non-uniform grain flow, which leads to the so-called orange peel effect. Annealing of UFG microstructure did not degrade this positive effect due to the formation of sharp recrystallization textures although the annealed microstructures have relatively coarse grains. It can be concluded that a good balance between strength and uniform formability without an orange-peel effect can be achieved in UFG microstructures by well-design annealing processes. (C) 2014 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [107M618]en_US
dc.description.sponsorshipThis study was mainly supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant no: 107M618. The authors would like to thank Eregli Iron and Steel (ERDEMIR), Inc., Zonguldak, Turkey for kindly supplying the initial materials.en_US
dc.identifier.doi10.1016/j.msea.2014.09.016en_US
dc.identifier.endpage128en_US
dc.identifier.issn0921-5093
dc.identifier.issn1873-4936
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage119en_US
dc.identifier.urihttp://doi.org/10.1016/j.msea.2014.09.016
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1190
dc.identifier.volume619en_US
dc.identifier.wosWOS:000345469500014en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorSaray, Onur
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofMaterials Science And Engineering A-Structural Materials Properties Microstructure And Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectUltrafine-grained materialsen_US
dc.subjectFormabilityen_US
dc.subjectAnnealingen_US
dc.subjectErichsen testen_US
dc.titleImprovement of formability of ultrafine-grained materials by post-SPD annealingen_US
dc.typeArticleen_US

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