Minimum durability date of age-hardenable aluminium alloysTuesday (05.11.2019) 17:55 - 18:15 Part of:
Age hardenable aluminum alloys are widely used in the industry to reach the global climate targets, especially they are used in the automotive industry. Mechanical properties and corrosion properties are mainly influenced by the alloy composition and thermomechanical history. Recently it has been shown, that the storage time at room temperature (natural aging) between solution heat treatment and artificial aging has a significant influence on ductility and strength. While the chemistry and heat treatment of aluminum alloys can be well controlled, the storage time at room temperature (natural aging) can’t be controlled easily through logistic reasons and transport or waiting time between processes. In this study the influence of natural aging was studied and a method for suppressing natural aging was developed. Dependent on the storage conditions aluminum alloys have a “minimum durability date” with degrading mechanical properties afterwards.