| In this study, the effect of Mn and Zr content on aging behavior and tensile properties of Al 7075 alloy was investigated when the excess Mn and Zr over the equilibrium solubility was added by the rapid solidification method. Flakes of the alloy containing different amounts of Zr were fabricated by atomizing the alloy and subsequently splat quenched on a rotating water-cooled copper drum. The flakes was extruded after the cold compaction and degassing and the followed by T6 heat treatment. Microstructure observation, plane analysis, room and high temperature tensile test and hardness test were pursued. To observe the effect of Zr and Mn on the mechanical behaviour of the alloys, some of the specimens were solutionized and then tensile tests were carried out. As the result of that, the Zr and Mn dispersoid in the alloy is found to increase the strength significantly without losing much elongation. |
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