Study the mechanical and morphological properties of aluminium alloy 7075 by aging treatments

The goal of the current research project is to determine the specimen's surface morphology and mechanical characteristics by examining the effects of single and duplex ageing on aluminum 7075 alloy (Al-Zn-Mg-Cu). The age hardening strengthening mechanism is responsible for (Al-Zn-Mg-Cu) alloys. The three steps of solid solution heating, quenching, and age hardening during the ageing process. Five samples are used in the single ageing heat treatment with a dimension of 60 mm in length and 25 mm in diameter. The specimens are first heated in a solid solution for one hour at 500 °C, followed by a 30-minute soak of the aluminum alloys in a salt bath. Following that, the specimens are matured for 2, 4, 6, 8, and 12 h at 160 °C temperature.. Duplex age-hardening process all five specimens are pre-heat at 160 °C after that double ageing process carried by different time periods same as the single ageing process. After heat-treated aluminum alloy specimens undergo investigation of mechanical properties such as tensile test, hardness test and surface morphology analysis using scanning electron microscopy. The result reveals that the aging process at a temperature of 160 °C for a period of 2 h, both the yield strength and tensile strength of the material experienced an increase of approximately 25 %