The effect of hot rolling temperature on the microstructure and properties of 6101 aluminum alloy

Abstract The effects of different initial and final hot-rolling temperatures on the microstructure and mechanical properties of 6101 aluminum alloy were systematically investigated using analytical methods such as optical microscopy (OM), scanning electron microscopy (SEM), tensile testing, and electrical conductivity measurements. The results indicate that although a higher initial hot-rolling temperature of 515°C resulted in slightly coarser grains and a minor reduction in electrical conductivity, it improved the uniformity of the grain structure and enhanced the fracture elongation. When the final hot-rolling temperature is set at 300°C, the mechanical properties meet the specifications for the 6101-T63 temper. The deformation stored energy retained from hot rolling promoted recrystallization nucleation, yielding a finer grain structure. This refined microstructure resulted in a less pronounced orange peel texture after bending, demonstrating improved bendability.