Microstructure and mechanical properties of Al/SiO2 composite produced by CAR process

Continual annealing and roll-bonding (CAR) process was used in this study as a very effective method for fabrication of the Al/15 vol.% SiO2 metal matrix composite. The microstructure of the produced composites after 6 cycles of the CAR process was showed an excellent distribution of SiO2 particles in the AA1100 matrix without any porosity. Particle breaking was one of the most important phenomena that can occur in CAR process. The results also were indicated that when the number of CAR cycle was increased, the tensile strength of the manufactured composites was improved, but their elongation was decreased at first step and then was increased. The tensile strength of the composite was 1.77 and 1.63 times higher than the same values was obtained for annealed and monolithic aluminum strips, respectively, while the elongation value was decreased slightly.