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We investigate the influence of natural senescence on mechanical properties of AMг5K, AMг6л and AMг10 alloys. We determine that the level of temporal resistance of the break rises to 15 and 5 %, and the lengthening of alloys rises to 40 and 10 % for AMг5K, AMг6л alloys after the natural senescence in the course of three years. Accordingly, the level of temporal resistance of the break of AMг10 alloy rises to 3 % and the relative lengthening falls to 70 % after the natural senescence in the course of three years. [ABSTRACT FROM AUTHOR]

The study determines the influence of iron and silicon admixtures, infused both separately and jointly, on formation of the phase composition, structure and mechanical properties of casting alloys of the system of Al-Mg-Zn with various content of magnesium and zinc. The research results show that silicon lowers mechanical properties of alloys at any magnesium content, iron admixtures decrease durability and plasticity of alloys under study at high magnesium concentration, they also decrease the alloys plasticity by 0,5 at low magnesium concentration. [ABSTRACT FROM AUTHOR]