High-Temperature Tensile Mechanical Properties and Microstructure of Rolled 6082-T6 Aluminum Alloy Sheets

The tensile properties of rolled 6082-T6 aluminum alloy were tested at a high temperature, and the influences of tensile temperature on its flow stress and anisotropy were studied. The microstructure evolution was characterized using optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). It was concluded that the tensile strength of the studied alloy decreases with increasing temperature. In higher-temperature deformation, the dislocation density decreases alongside the coarsening of precipitates, leading to a decrease in deformation resistance, and increase in the number of dimples and deepening of their sizes, exhibiting good plasticity. The alloy displays anisotropic mechanical properties at 200 degrees C due to the elongated grains and the orientation of the alpha-phase. The anisotropy becomes weaker with increasing temperature. There is no evident anisotropy at 400 degrees C, as the slip systems are activated more easily and the grains begin to recrystallize.

Automated summary

The tensile properties and anisotropy of rolled 6082-T6 aluminum alloy were investigated at high temperature. The microstructure evolution was analyzed using various microscopy techniques. The results showed that the tensile strength decreased with increasing temperature, while the plasticity improved. The alloy exhibited anisotropic mechanical properties at 200 degrees C, which weakened with increasing temperature and disappeared at 400 degrees C.