Abstract Scope |
Al-Mg-Si (6xxx) alloys are widely used in the lightweight construction of automotive structures. In addition to lightweighting, the recycling of aluminum alloys plays an important role for the optimization of the carbon footprint in the automotive industry. On the one hand, optimized Al-Mg-Si alloys require a narrow tolerance window, both for chemistry and process parameters, on the other hand, increasing recycling rates are a challenge for reaching a defined chemistry.
In this work the influence of alloy chemistry, grain size, pre-deformation and natural/artificial ageing parameters such as quench rate and time/temperature profiles were analyzed. 20 different Al-Mg-Si alloys, both with and without Cu, quench rates from 500K/min to 30,000K/min and ageing procedures including and excluding pre-deformation and natural ageing were systematically examined.
For the alloy 6082 (AlMgSiMn) yield strength values above 400MPa and elongation to fracture values exceeding 20% were measured.
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