Abstract
6XXX alloys (AlMgSi) are of great importance for the automotive industry and lightweight design. Currently, more than 100 different compositions (different levels 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 pre-aging heat treatment.
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Acknowledgements
The authors thank C Graupp for performing the mechanical testing, JK Sunde and CD Marioara for the TEM analysis and B Schwarz for the fruitful discussions. We are also grateful to the Austrian Research Promotion Agency FFG for their financial support (FFG project numbers 853869 and 872104).
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Wimmer, A., Hämmerle, A. (2021). Influence of the Quench Rate and Trace Elements on 6XXX Alloys. In: Perander, L. (eds) Light Metals 2021. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-65396-5_43
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DOI: https://doi.org/10.1007/978-3-030-65396-5_43
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