A Low Cost Method for Manufacturing of Aluminum/Alumina Composite by Anodizing and CRB Process

摘要

In this work, Al/Al_2O_3 composite strips are manufactured by a low cost method consist cold roll bonding (CRB) process of anodized aluminum strips. This technique has the flexibility to control the volume fraction of metal matrix composites (MMCs) by varying the oxide layer thickness on the anodized aluminum strip. Meanwhile pre- and post-rolling annealing treatment was performed on some produced MMCs. Microstructure, hardness, tensile strength, and elongation of composite strips are investigated as a function of alumina quantity and the applied production method. It is found that higher quantities of alumina improve hardness and tensile strength, while the elongation value decreases negligibly. Furthermore, pre-rolling annealing was found to be as the best method for producing this composite via the anodizing and CRB processes. Finally, it was found that both monolithic aluminum and aluminum/alumina composite exhibited a ductile fracture, having dimples and shear zones.