Effect of Mg content on the minimum grain size of Al–Mg alloys obtained by friction stir processing

Friction stir processing (FSP) is one of the severe plastic deformation processes that have been developed to improve the mechanical properties of both metals and alloys by producing an ultrafine-grained structure. In this study, it was used to realize the minimum grain size in Al–Mg alloys. The results indicate that the grain size in Al–Mg alloy decreases with increasing Mg content because of the influence of stacking fault energy in the Al–Mg alloy.