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dc.rights.licenseCreative Commons "Este é um artigo publicado em acesso aberto sob uma licença Creative Commons (CC BY 4.0). Fonte: Acesso em: 28 out. 2021.-
dc.contributor.authorGARCÍA, LAURA N.-
dc.contributor.authorRodrigo Magnabosco-
dc.contributor.authorBOERI, ROBERTO E.-
dc.contributor.authorTOLLEY, ALFREDO J.-
dc.contributor.authorSAAVEDRA, MARCELA E.-
dc.identifier.citationGARCÍA, L. N.; MAGNABOSCO, R.; BOERI, R. E.; TOLLEY, A. J.; SAAVEDRA, M. E. Formation of Cu-rich nanoprecipitates in Cu containing pearlitic SGI. International Journal of Metalcasting, v. 15, n. 4, p. 1164-1174, 2020.-
dc.description.abstractThe presence of Cu-rich nanoprecipitates in a pearlitic spheroidal graphite (ductile) cast iron alloyed with 0.82 wt%Cu was studied. The size and distribution of the precipitates were examined by transmission electron microscopy at different locations of the pearlitic matrix. Some areas were nearly free from precipitates, while other regions showed precipitates at the cementite and ferrite lamellae and at the ferrite/cementite interface. Calculation of the thermodynamic equilibrium under stable and metastable conditions using Thermo-Calc led to the identification of the conditions controlling the formation of Cu-rich nanoprecipitates along three different stages depending on the Cu concentration. Together with a differential scanning calorimetry test and elemental diffusional calculations, thermodynamic predictions supported the observation of Cu-rich precipitates despite the low concentration of Cu of the alloy investigated and allowed the authors to explain the observed heterogeneity in the distribution of precipitates as resulting from the heterogeneous distribution of Cu in the alloy caused by microsegregation during solidification. The knowledge gained is relevant for the design of strengthening strategies in SGI based on the dispersion of Cu-rich nanoprecipitates.-
dc.relation.ispartofInternational Journal of Metalcasting-
dc.rightsAcesso Restrito-
dc.subjectspheroidal graphite cast irons-
dc.subjectCu-rich nanoprecipitates-
dc.subjectnanostructured materials-
dc.subjecttransmission electron microscopy-
dc.titleFormation of Cu-rich Nanoprecipitates in Cu Containing Pearlitic SGIpt_BR
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