Influence of Microalloying Elements on the Negative Effect of Natural Pre-Aging on Artificial Aging in Al-Mg-Si Alloys

Marion Werinos, Stefan Pogatscher, Helmut Antrekowitsch, Thomas Ebner, F. Moszner, Peter J. Uggowitzer

Research output: Contribution to conferencePresentationResearch


Al-Mg-Si alloys are widely used in cast, wrought and extruded form. A characteristic property of these alloys is the negative effect of natural pre-aging at room temperature on artificial aging. Minor additions of Sn suppress the adverse effect of room temperature aging due to controlled buffering of quenched-in excess vacancies at low temperatures. In this study we evaluate the buffering performance of Sn in the temperature range between 5 and 45 °C. This is investigated for two Sn-added AA6061 alloys with systematic variation in their Mg-, Si- and Cu-content, for comparison the natural aging kinetics of a Sn-free alloy is studied. In general a strong dependence of hardening kinetics on temperature and on chemical composition is observed. Results of aging kinetics are discussed in terms of common clustering theories and calculations of the temperature dependent trapping effect of Sn on excess vacancies.
Original languageEnglish
Publication statusPublished - 3 Sept 2013
EventEuro LightMAT Conference 2013 -
Duration: 3 Sept 2013 → …


ConferenceEuro LightMAT Conference 2013
Period3/09/13 → …

Cite this