Ultrafine-Grained Al – Mg2Si Alloys with Transition Metal Additions and Improved Mechanical Properties

Abstract

The effect of combined processing by rotary swaging at room temperature followed by equal-channel angular pressing at 150°C and subsequent aging on the structure, phase transformations and strength characteristics of Al – Mg₂Si alloys with Sc and with joint additions of (Sc + Zr) and (Sc + Hf) is studied. The results obtained are used to recommend the aging modes for alloys in the initial state and after the combined processing to ensure an increase in their strength and ductility. The best set of mechanical characteristics is obtained for the Al – Mg₂Si – (Sc + Hf) composition.