Influence of Aluminium and Zinc Additives on the Physical and Thermal Behaviour of Cast Copper

  • Mohammad Salim Kaiser Directorate of Advisory, Extension and Research Services, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
  • Samiul Kaiser Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
Keywords: Cu-alloys, Age hardening, Precipitates, Conductivity, Absorbance, Microstructure


Role of aluminium and zinc additions on the physical and thermal behavior of cast copper are investigated. Metal casting is used in the production of bronze and brass with composition of 10wt% each Al and Zn. Cast alloys has been studied by subjecting to isochronal and isothermal ageing at various temperatures up to 500°C and different times ranging from 15 to 240 minutes respectively. Microhardness values of the differently processed alloys have been measured to understand the ageing behavior of Cu with Al and Zn addition. It is observed that hardening takes place due to solid-solution hardening. Al addition responses some age hardening behavior in the aged alloy due to formation of hard and brittle intermetallic of copper aluminites. The thermal conductivity of the alloys increases marginally through heat treatment due to stress relieving and decreases due to formation of intermetallic precipitates.  It is also found that incorporation of Al and Zn affects the absorbance properties of cast Cu. A microstructural study of the alloys reveals that the cast alloys contents the different phases of grains. It is also observed that all the alloys accomplish partially re-crystallized state after aging at 400°C for one hour.


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How to Cite
Kaiser, M., & Kaiser, S. (2020, April 22). Influence of Aluminium and Zinc Additives on the Physical and Thermal Behaviour of Cast Copper. Sustainable Structures and Materials, An International Journal, 3(1), 1-9. Retrieved from