The Influences Of Macrosegregation, Intermetallic Particles, And Dendritic Spacing On The Electrochemical Behavior Of Hypoeutectic Al-cu Alloys.

dc.creatorOsório, Wislei R
dc.creatorSpinelli, José E
dc.creatorBoeira, Alexandre P
dc.creatorFreire, Célia M
dc.creatorGarcia, Amauri
dc.date2007-Nov
dc.date2015-11-27T13:10:20Z
dc.date2015-11-27T13:10:20Z
dc.date.accessioned2018-03-29T01:05:13Z
dc.date.available2018-03-29T01:05:13Z
dc.identifierMicroscopy Research And Technique. v. 70, n. 11, p. 928-37, 2007-Nov.
dc.identifier1059-910X
dc.identifier10.1002/jemt.20496
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/17661364
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/197394
dc.identifier17661364
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1297627
dc.descriptionThe purpose of this research is (1) to investigate the influence of Al(2)Cu intermetallic particles associated with the dendritic arm spacing on the corrosion resistance of different hypoeutectic Al-Cu alloys and (2) to evaluate the electrochemical behavior of a hypoeutectic Al-Cu alloy directionally solidified under unsteady-state heat flow. The as-cast samples were produced using vacuum arc remelting and vertical upward water-cooled solidification. Microscopic examinations were carried out with optical microscopy and scanning electron microscopy + energy dispersiveX-ray analyses. To evaluate the surface corrosion behavior of such alloys, all corrosion tests were performed in a 0.5-M NaCl solution at 25 degrees C using an electrochemical impedance spectroscopy technique and potentiodynamic polarization curve analysis. Based on the tests, corrosion rate and impedance parameters were obtained. The present research has underlined the use of appropriate techniques of characterization for determining Al(2)Cu distribution, morphology, and fraction within the typical microstructures of Al-Cu alloys. The experimental results have established correlations between the Al-rich phase dendritic arm size, the intermetallic particles distribution in the eutectic mixture, the macrosegregation profile, and the resulting corrosion resistance.
dc.description70
dc.description928-37
dc.languageeng
dc.relationMicroscopy Research And Technique
dc.relationMicrosc. Res. Tech.
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAlloys
dc.subjectAluminum
dc.subjectCopper
dc.subjectElectrochemistry
dc.subjectElectron Probe Microanalysis
dc.subjectMicroscopy, Electron, Scanning
dc.titleThe Influences Of Macrosegregation, Intermetallic Particles, And Dendritic Spacing On The Electrochemical Behavior Of Hypoeutectic Al-cu Alloys.
dc.typeArtículos de revistas


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