Pre-precipitation stages of Al-0.70Mg-0.33Si and Al-0.65Mg-0.70Si (at.%) alloys have been investigated by atom probe field ion microscopy (APFIM) and high resolution transmission electron microscopy (HREM). Atom probe results show that clusters of Mg atoms are present in the asquenched state. After a prolonged aging at room temperature, clusters of Mg, Si and their co-clusters are detected, alt...

A modified strain-induced melting activation (SIMA) process is shown to improve high-temperature formability. The microstructural characteristics of the spheroidized grains of SIMA-processed alloys affect high-temperature formability. The effects of hot extrusion parameters and chemical composition on the evolution of spheroidized grains were investigated using several 6xxx series aluminum allo...