MICROSTRUCTURE AND CORROSION ANALYSIS OF RRA HEAT TREATED AA7075-T6 TEMPERED ALUMINIUM ALLOY

RRA heat treatment has improved the strength and corrosion resistance of AA7075 composite. The conditions of RRA heat treatment are optimized. In this paper, the optimized heat treatment parameters were found by performing different analyzes. Corrosion resistance and Strength of AA7075 composite were evaluated from the tensile test, hardness test, EDS, and SEM. From the results, we concluded that the parameters which improved the strength and corrosion resistance of AA7075 composite include preaging at 120 °C for 24 h, retrogression at 210 °C for 8 min, and reaging at 120 °C for 24 h.