Microstructures and Physio-Mechanical Properties of Sand Cast Copper-10%Aluminium Alloys.

Abstract

This study investigates the effect of addition of molybdenum on the microstructures, physical and mechanical properties of copper-10%aluminium alloys produced using sand casting techniques, as a potential replacement for conventional structural materials. The first approach to this research was casting a specimen with a crucible furnace. Metals were charged into the furnace according to their melting points. Molybdenum was introduced into the cast in different proportions from 1-10 wt% also a cast with zero wt% of molybdenum. After the alloying process, the specimens were sectioned, grinded, polished and etched before viewing under an optical metallographic microscope. Mechanical and physical tests were carried out on the specimens such as hardness, yield strength, tensile strength, electrical resistivity and electrical conductivity which show level of properties of each specimen. At the end of the experiments, it was concluded that the addition of molybdenum up to 7.0wt % to copper-10%aluminium alloys increases hardness, yield strength, tensile strength and electrical resistivity of copper-10% aluminum alloys and reduces its ductility and electrical conductivity.