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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/57726
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dc.creatorBeatriz Araújo Batistapt_BR
dc.creatorRenata Braga Soarespt_BR
dc.creatorVanessa de Freitas Cunha Linspt_BR
dc.creatorRoberto Braga Figueiredopt_BR
dc.creatorAnton Hohenwarterpt_BR
dc.creatorTulio Matenciopt_BR
dc.date.accessioned2023-08-11T13:01:34Z-
dc.date.available2023-08-11T13:01:34Z-
dc.date.issued2020-
dc.citation.volume22pt_BR
dc.citation.issue7pt_BR
dc.identifier.doihttps://doi.org/10.1002/adem.202000183pt_BR
dc.identifier.issn1527-2648pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/57726-
dc.description.resumoIn recent years, there has been a growing interest in developing biodegradable implants which are absorbed by the body after fulfilling a task. Pure iron is a candidate for such applications because it is considered biocompatible and it does not passivate in physiological media. Herein, the potential to increase the strength of pure iron through grain refinement is evaluated to allow a reduction in size of implants and its effect on corrosion behavior. High-pressure torsion is applied to process pure iron and to refine the grain size of less than 1 μm. Annealing at different temperatures is used to produce samples with different grain sizes. Compression tests show a significant increase in flow stress to over 1 GPa in samples with very small grain sizes. However, such structure is associated with negligible strain hardening and strain-rate sensitivity. Electrochemical and immersion tests in Hank's solution show that the grain refinement reduces the corrosion rate significantly. Samples with grain sizes smaller than 1 μm display uniform corrosion and develop a homogeneous surface layer of corrosion products. Thus, severe plastic deformation followed by annealing produces mechanically stronger pure iron with reduced biodegradability.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICApt_BR
dc.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICApt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofAdvanced Engineering Materialspt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectBiodegradablept_BR
dc.subjectCorrosionpt_BR
dc.subjectMechanical propertiespt_BR
dc.subjectPure ironpt_BR
dc.subjectUltrafine grainspt_BR
dc.subject.otherEletroquímicapt_BR
dc.subject.otherMateriais — Biodegradaçãopt_BR
dc.subject.otherMetais — Propriedades mecânicaspt_BR
dc.subject.otherFerro — Corrosãopt_BR
dc.subject.otherSolução (Química)pt_BR
dc.titleCorrosion in Hank's solution and mechanical strength of ultrafine-grained pure ironpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://onlinelibrary.wiley.com/doi/10.1002/adem.202000183pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2490-0930pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6357-9553pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9827-9828pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-5660-8125pt_BR
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