EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Composition graded AlMgSi wires were achieved with a to a two-step process. A composite made of 1370AA inserted in a 6201AA tube was first cold drawn to obtain appropriate mechanical bounding and then annealed at 500°C to achieve a composition gradient along the wire diameter. These diffusion gradients were estimated by nano-hardness profiles and a good agreement with theoretical prediction was found. The same approach was used to evaluate the evolution of the property gradient resulting from precipitation treatments. Precipitates that nucleated and grew in the composition gradient were characterized by TEM, and the solute content was measured using APT. These microstructural data were finally correlated to the macroscopic properties of the wires that were evaluated thanks to tensile tests and electrical conductivity measurements. This work shows that a full range of properties combination can be achieved thanks to composition graded structures.