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Talks and Poster Presentations (without Proceedings-Entry):

A. Falahati, P. Lang, M.R. Ahmadi, A. Danninger, E. Kozeschnik:
"Influence of Natural Aging and Pre-deformation on Precipitation Kinetics and Tensile Properties of Artificially Aged Al-Mg-Si-(Cu) Alloys";
Talk: 6th international Light Metals Technology Conference (LMT 2013), Old Windsor, UK; 07-24-2013 - 07-26-2013.



English abstract:
In the present work, tensile tests are carried out on Al-Mg-Si-(Cu) alloys at room temperature after stretching and artificial aging. By varying different parameters after solution annealing, like natural aging time before and after deformation and single and multistep stretching to a maximum of 7% deformation, the changes in mechanical properties after artificial aging are investigated. In modeling the mechanical properties of the final product, the amount of excess quenched in vacancies, deformation induced vacancies and their time and temperature-dependent evolution, which play a fundamental role in the early stages of precipitation, have been taken into account. The effect of stretching determines mainly the evolution of dislocations and is considered in terms of heterogeneous precipitation on dislocations and accelerated precipitate growth and coarsening via pipe diffusion. The corresponding models are implemented in the thermo-kinetic simulation software MatCalc. With this software, predicted yield strength evolution of combined thermal heat treatment and room temperature deformation are compared with the experimental results.

Keywords:
6xxx alloys, natural aging, precipitation kinetics, deformation

Created from the Publication Database of the Vienna University of Technology.