Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/57301
Type: Artigo de periódico
Title: Corrosion Resistance and Mechanical Properties of an Al 9wt%Si Alloy Treated by Laser Surface Remelting
Author: Osorio, WR
Cheung, N
Peixoto, LC
Garcia, A
Abstract: The correlation of corrosion behavior and mechanical properties with microstructure parameters can be very useful for planning solidification conditions in order to achieve a desired level of final properties. The aim of the present work is to investigate the influence of microstructural array parameters of as-cast and laser remelted Al-9 wt% Si alloy samples on the resulting mechanical properties and the electrochemical behavior. As-cast samples were obtained with two different cooling rates and surface remelted samples by laser were obtained with a continuous CO(2) laser. Electrochemical impedance spectroscopy (EIS) technique and Tafel's plots in a 0.5M NaCl test solution at 25 degrees C were carried out. An equivalent circuit has also been proposed and impedance parameters have been simulated by the Zview (R) software. Laser surface remelting (LSR) have induced microstructural morphologies typified by highly branched fine silicon fibers with a deleterious effect on the electrochemical corrosion resistance.
Subject: As-cast microstructure
Mechanical properties
Dendrite arm spacing
Corrosion behaviour
Laser remelting
Country: Sérvia
Editor: Electrochemical Science Group
Citation: International Journal Of Electrochemical Science. Electrochemical Science Group, v. 4, n. 6, n. 820, n. 831, 2009.
Rights: fechado
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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