ABSTRACT
This article presents two case studies referring to the severe plastic deformation applied to Al-Mg-Si alloys. In a first case study, an Al-Mg-Si alloy in a T6 temper is subjected to equal-channel angular pressing (ECAP), and all the microstructure strengthening contributions to the alloy yield stress are determined through specific modeling and then validated. In a second case study, two Al-Mg-Si alloys, one with Zr addition and a second with Sc-Zr addition, are subjected to ECAP after a T6 temper in an overaged status. In the second case, the role of the Zr- and Sc-Zr-containing nanometer dispersoids is described, and the related strengthening effect is modeled according to the models presented in the first case study.
