Severe plastic deformation of an as-cast hypoeutectic Al–Si alloy
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Different equal channel angular pressing (ECAP) processing routes have been employed to investigate the flow plane microstructures in a hypoeutectic Al–7wt%Si. In the as-cast condition, this alloy exhibits equiaxed primary aluminum dendrite cells embedded in an Al–Si eutectic constituent. The observed microstructures have been compared to the predicted distortion of a volume element expected during idealized ECAP. The effect of different processing routes on the microstructure refinement, degree of homogenization of second phase particles, and associated mechanical properties are discussed.
KeywordsEqual Channel Angular Pressing Strain Path Flow Plane Equal Channel Angular Pressing Pass Equal Channel Angular Pressing Processing
The authors acknowledge financial support from CICYT under program MAT2003/01172. J. García-Infanta would like to express his thanks to the Spanish Ministry of Education and Science for providing an FPI fellowship number BES-2004-4865, and travel expenses. T. R. McNelley and S. Swaminathan acknowledge partial support for this work by the U.S. Air Force Office of Scientific Research under funding document no. F1ATA06058G001. S. Swaminathan acknowledges a U.S. National Research Council Fellowship.