First application of heat-treatable aluminium sheets for high-tech chassis components
Axles and subframes are complex-shaped components and welded assemblies. When welded, the materials used must withstand high static and dynamic loads and must ensure that these properties are maintained during operation at elevated temperatures and under corrosion attack, throughout the vehicle’s service life. Furthermore, tolerant overload response must be guaranteed to allow a certain plastic deformation to occur without rupture.
The heat-treatable AMAG 6082.9 alloy was developed with a view to meeting that complex requirements specification. In as-delivered condition, the material has good formability and can be welded by conventional methods. Subsequent artificial aging of the assemblies on the customer’s premises ensures that a yield strength of at least 260 MPa is achieved, and so this material outperforms the classical 5xxx alloys by a factor two, providing a basis for superior lightweight potential.
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