Assessment of Electrochemical and Mechanical Behavior of Hot-Extruded Powders and As-Cast Samples of Al-Ni Alloys

dc.creatorOsorio, WR
dc.creatorFreitas, ES
dc.creatorSpinelli, JE
dc.creatorCante, MV
dc.creatorAfonso, CRM
dc.creatorGarcia, A
dc.date2012
dc.dateOCT
dc.date2014-07-30T13:51:06Z
dc.date2015-11-26T16:28:52Z
dc.date2014-07-30T13:51:06Z
dc.date2015-11-26T16:28:52Z
dc.date.accessioned2018-03-28T23:09:56Z
dc.date.available2018-03-28T23:09:56Z
dc.identifierInternational Journal Of Electrochemical Science. Electrochemical Science Group, v. 7, n. 10, n. 9946, n. 9971, 2012.
dc.identifier1452-3981
dc.identifierWOS:000312933600072
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/54978
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/54978
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269583
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionThe cellular or dendritic morphologies of the Al-rich matrix as well as the morphology, size, and distribution of the intermetallic particles can affect not only the electrochemical corrosion resistance but also the mechanical strength of Al-Ni alloys. The aim of this work is to analyze the effects of two different powder size (d) ranges (d<45 mu m; 106 mu m<d<180 mu m) of Al-Ni alloy samples prepared by nitrogen gas atomization followed by compaction and hot extrusion consolidation, on the microstructure, corrosion behavior and mechanical properties. The corresponding characteristics and properties of directionally solidified Al-Ni alloy samples (as cast) are also examined. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization techniques and an equivalent circuit analysis were used to evaluate the electrochemical behavior in a 0.5 M NaCl solution at room temperature. It was found that finer microstructure arrays are associated with better electrochemical behavior. This was shown to be intimately associated with fragmented or globular Al3Ni intermetallic particles, which detached from the eutectic mixture reducing the cathode area and interfering in the corrosion action. A combined plot of corrosion and mechanical properties as a function of a representative microstructural parameter is proposed, permitting an appropriate combination of these properties to be designed based on the alloy microstructure.
dc.description7
dc.description10
dc.description9946
dc.description9971
dc.descriptionFAEPEX-UNICAMP
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageen
dc.publisherElectrochemical Science Group
dc.publisherBelgrade
dc.publisherSérvia
dc.relationInternational Journal Of Electrochemical Science
dc.relationInt. J. Electrochem. Sci.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectAl-Ni alloy
dc.subjectHot Extrusion
dc.subjectGas atomization
dc.subjectMicrostructure
dc.subjectMechanical properties
dc.subjectCorrosion resistance
dc.subjectCorrosion Behavior
dc.subjectSi Alloys
dc.subjectMicrostructure
dc.subjectMacrosegregation
dc.subjectArray
dc.titleAssessment of Electrochemical and Mechanical Behavior of Hot-Extruded Powders and As-Cast Samples of Al-Ni Alloys
dc.typeArtículos de revistas


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