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A Polycrystal Model to Evaluate Mechanical Properties of Asymmetrically Rolled AL Sheets

2010-06-12Journal article Restricted access
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datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorSousa, R. J. Alves de
dc.contributor.authorSimões, F. J. P.
dc.contributor.authorGrácio, J. J.
dc.contributor.authorYoon, J. W.
dc.date.accessioned2025-12-12T17:35:27Z
dc.date.available2025-12-12T17:35:27Z
dc.date.issued2010-06-12
dc.description.abstractThe asymmetric rolling process (ASR) differs from conventional rolling (CR) through the use of different roll circumferential velocities. Using proper parameters, asymmetric rolling imposes intense shear deformations across the sheet thickness, leading not only to the occurrence of shear texture, but also to grain refinement [1]. Some shear texture components are known to improve plastic strain ratio values, and consequently formability. In Simões et al. [4], a AA1050-O sheet was asymmetrically rolled and annealed. Shear texture was obtained, as opposed to typical gamma-fiber texture obtained on sheets rolled through the conventional process. Shear tests were used to evaluate strength and formability. A polycrystal plasticity model, as formulated by Gambin [2] and implemented by Alves de Sousa [3], was employed to evaluate texture evolution and to give a sounding theoretical basis for the improved mechanical properties on sheets after the process. For FCC materials, this approach avoids the uniqueness issue related to the choice of the set of active slip systems by applying a regularized Schmid Law. Consequently, it generates yield surfaces with smooth corners where the normal vector is always uniquely defined. In the following sections, implementation guidelines are given. The accuracy of simulation results and the advantages of the asymmetric rolling process, when compared to conventional rolling, are the main topics of discussion.eng
dc.description.sponsorshipThe support given by Portuguese Science Foundation (FCT) under the grant PTDC/EME-TME/098845/2008 is here gratefully acknowledged.
dc.identifier.citationAlves de Sousa, R.J., Simões, F.J.P., Grácio, J.J. et al. A Polycrystal Model to Evaluate Mechanical Properties of Asymmetrically Rolled AL Sheets. Int J Mater Form 3 (Suppl 1), 61–64 (2010). https://doi.org/10.1007/s12289-010-0707-2.
dc.identifier.doi10.1007/s12289-010-0707-2
dc.identifier.eissn1960-6214
dc.identifier.issn1960-6206
dc.identifier.urihttp://hdl.handle.net/10400.8/15027
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer Nature
dc.relationInnovative Techniques and Efficient Strategies For Numerical Modelling and Experimental Analysis of Symmetrical and Asymmetrical Incremental Sheet Forming Processes
dc.relation.hasversionhttps://link.springer.com/article/10.1007/s12289-010-0707-2
dc.relation.ispartofInternational Journal of Material Forming
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAluminium
dc.subjectRate Independent
dc.subjectPolycrystal
dc.subjectAsymmetric Rolling
dc.titleA Polycrystal Model to Evaluate Mechanical Properties of Asymmetrically Rolled AL Sheetseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInnovative Techniques and Efficient Strategies For Numerical Modelling and Experimental Analysis of Symmetrical and Asymmetrical Incremental Sheet Forming Processes
oaire.awardURIhttp://hdl.handle.net/10400.8/15026
oaire.citation.endPage64
oaire.citation.issueS1
oaire.citation.startPage61
oaire.citation.titleInternational Journal of Material Forming
oaire.citation.volume3
oaire.fundingStreamConcurso para Projectos de I&D em todos os Domínios Científicos - 2008
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSimões
person.givenNameFábio
person.identifier1149772
person.identifier.ciencia-id8318-28F7-FDA3
person.identifier.orcid0000-0002-7112-5818
person.identifier.scopus-author-id7003767440
relation.isAuthorOfPublication36231584-02bc-4537-ae3d-b9fca0de4b3a
relation.isAuthorOfPublication.latestForDiscovery36231584-02bc-4537-ae3d-b9fca0de4b3a
relation.isProjectOfPublicationa95a6246-bdf6-4508-83b2-e0234d4a48a7
relation.isProjectOfPublication.latestForDiscoverya95a6246-bdf6-4508-83b2-e0234d4a48a7

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The asymmetric rolling process (ASR) differs from conventional rolling (CR) through the use of different roll circumferential velocities. Using proper parameters, asymmetric rolling imposes intense shear deformations across the sheet thickness, leading not only to the occurrence of shear texture, but also to grain refinement [1]. Some shear texture components are known to improve plastic strain ratio values, and consequently formability. In Simões et al. [4], a AA1050-O sheet was asymmetrically rolled and annealed. Shear texture was obtained, as opposed to typical gamma-fiber texture obtained on sheets rolled through the conventional process. Shear tests were used to evaluate strength and formability. A polycrystal plasticity model, as formulated by Gambin [2] and implemented by Alves de Sousa [3], was employed to evaluate texture evolution and to give a sounding theoretical basis for the improved mechanical properties on sheets after the process. For FCC materials, this approach avoids the uniqueness issue related to the choice of the set of active slip systems by applying a regularized Schmid Law. Consequently, it generates yield surfaces with smooth corners where the normal vector is always uniquely defined. In the following sections, implementation guidelines are given. The accuracy of simulation results and the advantages of the asymmetric rolling process, when compared to conventional rolling, are the main topics of discussion.
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