Abstract In the present investigation AA7075 (Al–5.4Zn–2.6 Mg) alloy is subjected to peak aging treatment at 100, 120 and 150 °C obtain maximum induced hardness due solid solution strengthening. succession, by results of heat treated two step three under non-pre aged pre-aged conditions. The this modified indicated that has resulted in enhanced 185.6 VHN as compared 142.9 100 resulting 29.88% i...