Superplasticity of Al-Mg-Sc(Zr) alloys, subjected to intense plastic deformation


The data devoted to the high-strain-rate superplasticity of Al-Mg alloys containing dispersoids of aluminides of scandium and zirconium and having ultrafine-grained structure produced by severe plastic deformation were reviewed. The potential of various severe plastic deformation techniques to improve the superplastic characteristics of Al-Mg-Sc(Zr) alloys was discussed. The origin of high superplastic properties as well as their degradation is considered depending on the regimes and methods of deformation. The effectiveness of treatment mode, combining severe and conventional deformation to process sheets with high-temperature superplastic properties is evaluated.