Microstructure, mechanical properties and formability of friction stir processed interstitial-free steel

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dc.authorid0000-0002-9378-3870en_US
dc.contributor.authorSekban, D. M.
dc.contributor.authorSaray, Onur
dc.contributor.authorAktarer, S. M.
dc.contributor.authorPurcek, G.
dc.contributor.authorMa, Z. Y.
dc.date.accessioned2021-03-20T20:15:05Z
dc.date.available2021-03-20T20:15:05Z
dc.date.issued2015
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractThe microstructure, mechanical properties and stretch formability of fine-grained (FG) interstitial-free steel (IF-steel) formed by friction stir processing (FSP) was investigated systematically. One-pass FSP drastically refined the microstructure with aid of dynamic recrystallization (DRX) mechanism during processing and formed volumetric defect free basin-like processed region (PR) with a mean grain size of 5 mu m (initial grain size was 40 mu m). This microstructural evolution brought about a considerable increase in both hardness and strength values of IF-steel without considerable decrease in ductility values. Also, strain hardening dominated deformation behavior was obtained with the FSPed samples as an essential property for the engineering application. Coarse-grained (CG) IF-steel demonstrated high formability with an Erichsen index (El) of 2.88 mm. Grain refinement by FSP yielded very close El value of 2.80 mm with increasing punch load (F-El). Force-displacement curves obtained in each process conditions reflected a similar membrane straining regimes where samples uniformly thinned under biaxial tension loads with aid of strain hardening capability. The formation of FG microstructure by FSP reduced the roughness (orange peel effect) of the free surface of biaxial stretched sample by decreasing the nonuniform grain flow leading to the so-called orange peel effect. It is concluded that a good balance of strength, ductility and strain hardenability along with equivalence formability to CG condition can be achieved by FSP as a single step practical procedure. (C) 2015 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.msea.2015.06.068en_US
dc.identifier.endpage64en_US
dc.identifier.issn0921-5093
dc.identifier.issn1873-4936
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage57en_US
dc.identifier.urihttp://doi.org/10.1016/j.msea.2015.06.068
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1147
dc.identifier.volume642en_US
dc.identifier.wosWOS:000359167300008en_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.subjectIF-steelsen_US
dc.subjectFriction stir processingen_US
dc.subjectGrain refinementen_US
dc.subjectFormabilityen_US
dc.titleMicrostructure, mechanical properties and formability of friction stir processed interstitial-free steelen_US
dc.typeArticleen_US

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