The Effect of Quenching on Physical Characteristics of Recycled AA6061 Aluminum Chips.

This research is to investigate physical characteristics of the milled recycling aluminum AA6061 according to the change of the quenching time (heat treatment) using the milling process and followed by a cold press forging process. The chips of AA6061 are produced from high speed milling process. Physical properties of the milled recycled chip of AA6061 were studied. Six values of quenching time were taken (0, 2, 4, 6, 8, and 10) hours. On the other hand, the quenching and aging temperature is constant. The results were showing that the microstructure, porosity and density that the optimum is 8 hours. But for microhardness Vickers, the optimum is at 2 hours. It's shows that the optimum value of density (2.55 g/cm3), porosity (1.95%), and hardness value (122.02 Hv). It can be concluded; 2 hours of quenching time is the best choice for all groups. [ABSTRACT FROM AUTHOR]