Abstract
In this research, the samples of Cu-10Zn-xAl alloys were manufactured by gravity die casting process using Cu, Zn and Al ingots as the feeding materials. The aluminum addition was varied to 1, 2.5, and 6 wt. %, respectively. The as-cast samples with dimension of 100x100x6 mm3 were homogenized at temperature of 800 °C for 2 hours. Samples characterization includes chemical composition analysis, microstructure observation, tensile and hardness testing. The results showed that the addition of Al to the Cu-10Zn alloys significantly affected the microstructure and mechanical properties. The addition of 5.93 wt. % Al promotes the presence of β phase at the as-cast sample. Furthermore, the addition of Al to the Cu-10Zn alloy tends to increase the tensile strength, elongation and hardness.
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