Optimizing the ageing treatment of extruded 6xxx alloy profiles

This thesis explores the mechanical properties and microstructure of a 6xxx-series aluminum alloy, focusing on how positioning within an ageing oven and variations in extruded profile thickness affect these characteristics. The study analyzes direct extrusion of 6060 alloy profiles subjected to T6 heat treatment. Mechanical properties, including hardness, yield strength, ultimate tensile strength, and elongation at break, were evaluated alongside microstructural analysis. A notable thermal gradient within the ageing oven was identified, influencing the mechanical performance and microstructural development of the material. Variations in mechanical properties and microstructure are attributed to the non-uniform thermal exposure during the ageing process, affecting the material's precipitation hardening behavior. By understanding the relationship between furnace uniformity, material positioning, and the resulting mechanical properties and microstructure, this study aims to enhance both the efficiency and the quality of the extrusion process.