Fabrication and Strengthening Mechanisms of Al/WC Particles Composite Prepared by Accumulative Roll Bonding

摘要

Aluminium metal matrix composites reinforced with WC ceramic particles were manufactured through warm accumulative roll bonding (ARB) in this study. The microstructures of the composites exhibited excellent particles distribution in the matrices. Compared with the mechanical properties of ARB monolithic pure Al, the Al/WC composites exhibited higher tensile strength. The shear lag theory modified was used in considering the yield strength of the composites. The results indicated that the effects of WC particles in Al/WC composite lead to the thermal expansion dislocation strengthening, small subgrain strengthening, Orowan strengthening and geometrically necessary dispersion strengthening.