An alternative method for manufacturing Al/B4C/SiC hybrid composite strips by cross accumulative roll bonding (CARB) process

Abstract

For the first time, the cross accumulative roll bonding (CARB) process was used as an effective alternative method for manufacturing Al/B4C/SiC hybrid composite strips and compared with the accumulative roll bonding (ARB) processed hybrid composite. The XRD results showed that nanostructured Al/B4C/SiC hybrid composites have successfully been fabricated by using CARB process without any additional phase. During CARB, the ceramic reinforcement particles (B4C and SiC) were more uniformly dispersed within the matrix compared with ARB process, due to changes in strain path. In addition, the tensile strength, elongation, and microhardness of CARB composites were measured to be higher than those in the ARB product. Finally, scanning electron microscopy (SEM) observations of fractured surfaces showed that fracture mode both hybrid composites was shear ductile rupture, dimples, and shear zones.