Effect of aging on structural changes and level of mechanical properties of the Al—Mg alloys microalloyed by scandium and zirconium

Abstract

The effect of aging at 300 ^оC on the structure and mechanical properties of wrought Al— 4,45Mg alloy alloyed by complexes Mn + Cr and Sc + Zr was studied. Semi-finished products (rods with a diameter of 6 mm) from studied alloys were manufactured by twostage extrusion of ingots. It is shown that the aging of extruded semi-finished products at 300 ^оC during 2 h. resulted to some reduction in the strength characteristics with an increase in plasticity in the case of alloying by complex Mn + Cr. In the case of alloying by complex Sc + Zr there is a significant increase in the strength characteristics at maintaining the achieved level of plasticity. Keywords: aluminum alloys, microalloying, dislocation structure, strength, ductility. Full text download