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P. Lang, A. Falahati, E. Povoden-Karadeniz, M. Ahmadi, P. Warczok, E. Kozeschnik:
"Modeling of the Yield Strength Evolution in Al-Mg-Si Alloys";
Talk: ICAA 12, Yokohama; Japan; 2010-09-05 - 2010-09-09; in: "Proceedings - The 12th Internatinal Conference on Aluminium Alloys", (2010), ISBN: 978-4-905829-11-9; 1443 - 1448.

With the thermo-kinetic software MatCalc, simulations of the evolution of precipitates in the course of thermo-mechanical treatment of heat-treatable Al-Mg-Si alloys are performed. Based on the calculated size distributions for the different stable and metastable precipitates, the evolution of the yield strength with time during different thermal processing routes is evaluated. The strengthening model used takes into account the contributions of the intrinsic yield strength of the aluminium matrix, solid solution hardening and precipitation hardening. For precipitation hardening, the coupling effect of multiple precipitates and the shape of the precipitates are considered as well as the mechanism change from particle cutting and to Orowan looping. The model is applied to isothermal age-hardening of Al-Mg-Si alloys. The comparison between the yield strength predicted by the simulations and experiment shows good agreement.

Aluminium alloys, precipitation kinetics, precipitation strengthening, yield strength