Fabrication of Nanostructured Aluminum-Boron Carbide Composites by Accumulative Roll Bonding Process

Al-B4C composites have attracted attention of a large number of researchers and industrial societies dealing with military, nuclear, transport, and computer fields. In this research, the structure of these composite materials produced by a method based on accumulative roll bonding (ARB) was considered. The results showed that applying a specific draft percentage of reduction of %66 during inserting the reinforcement layers and then that of %50, a desirable cold weld between the sheets is obtained. X-ray diffraction and transmission electron microscopy analyses revealed that after 7 ARB passes, nanostructures elongated in the rolling direction are developed. Furthermore, a suitable distribution of the reinforcing boron carbide particles in the nanostructured aluminum matrix was achieved after 7 ARB passes, suggesting the pleasant efficiency of the employed route.]