| Abstract Scope |
6XXX alloys (AlMgSi) are of great importance for the automotive industry and lightweight design. Currently, more than 100 different compositions (different lev-els of alloying elements, different magnesium:silicon ratios, trace elements,…) of the alloy 6082 are known, showing big differences in mechanical and corrosion properties. Especially high-alloyed 6082, 6061 and 6066 have a significant quench and corrosion susceptibility. In this study, quench rates between 1 and 200 °C/s were applied to study the effect on mechanical and corrosion properties. Different magnesium and silicon levels were analyzed as a function of quench rate and aging parameters. It has been found, that in most cases a higher strength can be achieved with a hot quench medium. Possible explanations are the lower viscosity with a better heat transfer coefficient, furthermore a hot quench medium could act as a preaging heat treatment. |