Experimental Analysis on the Forging Process of Al 6061 and Al 7075 Aluminium Alloys

The metal forming processes of 6061 and 7075 aluminium alloys by forging at elevated temperatures was analysed experimentally. In forging operation, folding, under filling, broken streamline, fracture, coarse grain, and other micro and macro flaws are simply caused due to the deformation properties of aluminium alloys, including slight forge able temperature part, rapid heat depletion to dies, strong bonding, maximum strain sensitivity and high flow resistance. Experimental analysis for different specimens were carried out and compared in terms of forging load to deformation by using pneumatic hammer and hydraulic press and finally after the study it was found out that resistance to deformation rises with the decrease in forging temperature and rise in strain rate in the case of both 6061 and 7075 aluminium alloys and flow stress decreases for both the alloys (Al 6061 & Al 7075) after 50% deformation with showing maximum forge ability (minimum flow stress) under following conditions with minimum reduction of 30% and forging temperature of 450℃.