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dc.contributor.authorVida, Talita Almeida
dc.contributor.authorSoares, Thiago
dc.contributor.authorSeptimio, Rudimylla Silva
dc.contributor.authorBrito, Crystopher Cardoso
dc.contributor.authorCheung, Noé
dc.contributor.authorGarcia, Amauri
dc.date.accessioned2019-10-03T17:31:33Z
dc.date.available2019-10-03T17:31:33Z
dc.date.issued2019
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-mr-2019-0009
dc.identifier.citationMaterials Research. ABM, ABC, ABPol, v. 22, p. -, 2019.
dc.identifier.issn1516-1439
dc.identifier.urihttp://hdl.handle.net/11449/183766
dc.description.abstractThis study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state conditions of heat extraction. Microstructure characterization, microhardness, linear polarization and electrochemical impedance spectroscopy (EIS) tests were performed. A unique type of microstructure was observed, characterized essentially by a morphology typified by idiomorphic MgZn2 crystals in a “complex eutectic mixture” [coexistence of stable (Zn+Mg2Zn11) and metastable (Zn+MgZn2) eutectics]. The correlation between thermal and microstructural parameters, permitted experimental growth laws, correlating the evolution of the lamellar eutectic spacing with the cooling rate to be established. Vickers microhardness and electrochemical corrosion tests showed that more refined microstructures associated with higher experimental cooling rates, are related to a better set of higher hardness and corrosion resistance.en
dc.format.extent-
dc.language.isoeng
dc.publisherABM, ABC, ABPol
dc.relation.ispartofMaterials Research
dc.sourceSciELO
dc.subjectZn-Mg alloysen
dc.subjectSolidificationen
dc.subjectMicrostructureen
dc.subjectMacrosegregationen
dc.subjectCorrosionen
dc.titleEffects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloyen
dc.typeArtigo
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUniversidade Estadual de Campinas Departamento de Engenharia de Manufatura e Materiais
dc.description.affiliationUniversidade Estadual Paulista
dc.description.affiliationUnespUniversidade Estadual Paulista
dc.identifier.doi10.1590/1980-5373-mr-2019-0009
dc.identifier.scieloS1516-14392019000700227
dc.rights.accessRightsAcesso aberto
dc.identifier.fileS1516-14392019000700227.pdf
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