The paper examines how scandium and zirconium doping of Al-Mg alloys produced by conventional casting and powder metallurgy methods influences their structure and mechanical properties. It is shown that Al-Mg powder alloys are not recrystallized in the plastic deformation process and subsequent heating to 550°C. In cast alloys, recrystallization begins even in the extrusion process. Additions of scandium, zirconium, and chromium restrain the recrystallization of alloys when heated to 550°C. Doping of Al-Mg alloys with scandium and zirconium increases their strength by 80−120%. Doped powder alloys have much greater strength than cast alloys and quite high plasticity.
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