Artículos de revistas
Corrosion Resistance and Mechanical Properties of an Al 9wt%Si Alloy Treated by Laser Surface Remelting
Registro en:
International Journal Of Electrochemical Science. Electrochemical Science Group, v. 4, n. 6, n. 820, n. 831, 2009.
1452-3981
WOS:000267341400007
Autor
Osorio, WR
Cheung, N
Peixoto, LC
Garcia, A
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) 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. 4 6 820 831 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)