The effect of nickel addition on some mechanical properties of aluminum-copper alloy (Al-4%Cu-1.5%Mg).

The current investigation aims to investigate the impact of nickel addition on the mechanical properties of Aluminum-Copper alloy (Al-4%Cu-1.5%Mg). Percentages of nickel %wt. 0, 6, 9, and 13 were additives. The alloys were artificial aging at 250 oC for different periods; 5, 25, 125, 175, 250, and 300 minutes. There were microstructure, hardness, and tensile tests performed. According to the findings of the tensile test, the artificial aging of the alloy improves its ultimate tensile strength, yield stress, and elongation. Adding nickel to the alloy with different percentages improves the above properties compared to the nickel-free alloy. The tensile strength, yield stress, and elongation of an alloy containing 9% nickel and aging in 250 minutes are 240 MPa, 125 MPa, and 10%, respectively, while for a nickel-free alloy, are 70 MPa, 60 MPa, and 0.5% respectively. The results showed that increasing nickel improves mechanical properties, and the best was achieved at 9% of nickel. [ABSTRACT FROM AUTHOR]