Effect of silicon carbide volume fraction on the work hardening behaviour of thermomechanically processed aluminium-based metal-matrix composites

摘要

An understanding of the work hardening behaviour of particulate reinforced metal-matrix composites is crucial in optimizing the parameters for deformation processing of these materials. In the case of particulate-reinforced aluminium composites, the microstructure and mechanical properties can be altered by thermomechanical treatments as well as by changing the reinforcement volume fraction. In this study metal-matrix composites with different levels of reinforcement were synthesized by the disintegrated melt deposition technique. The as-processed composites were then extruded and their mechanical properties evaluated. A modified continuum model was then used to relate the work hardening behaviour of the composites to microstructural parameters. The model is shown to be applicable for all the composite materials investigated in the present study.