Manufacturing of High-Performance Al356/SiCpComposite by CAR Process

Abstract

Al356/SiC_p composites suffer from some important defects such as porosity, non-uniform distribution of the SiC particles, weak bonding between SiC_p and matrix, and presence of coarse silicon fibers with non-uniform distribution, which collectively result in low mechanical properties. In order to overcome all the mentioned problems in this type of composite, this study used continual annealing and roll-bonding (CAR) process as a very effective method for manufacturing Al356/SiC_p composite. The microstructure of the fabricated composite after twelve CAR cycles showed an excellent distribution of SiC and spherical silicon particles in the matrix with good bonding between SiC particles and matrix. The results also indicated that when the number of CAR cycles increases, the tensile strength of the produced composites improves, while their ductility decreases at first and then increases.