Microstructure evolution during extrusion of aluminium alloys by using FEM

Aluminum alloy profiles are increasingly used for structural applications due to their high specific strength, low density, good corrosion resistance, and recyclability [1]. Hot extrusion is the manufacturing process that is able to produce final profiles with mechanical, crash, and corrosion properties that are strictly dependent on the grain structure and texture [2-5]. The relation between microstructure and these properties was investigated by several authors [6-8], proving that a finer grain size produces benefits in terms of both mechanical and crash performances.