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Effect of scandium on the phase composition and mechanical properties of ABM alloys

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Abstract

The effect of scandium on the composition and mechanical properties of ABM-1 alloys (Al-30% Be-5% Mg) is studied. The scandium content is varied from 0.1 to 0.5 wt %. It is established that, in the studied part of the Al-Be-Mg-Sc system, an aluminum solid solution (Al) and the ScBe13 compound are in equilibrium with a beryllium solid solution (Be). Magnesium dissolves in both the aluminum component and the ScBe13 compound. The strengthening effect related to the decomposition of the solid solution and the precipitation of Al3Sc cannot be extended to the strengthening of ABM-type alloys. Additions of 0.1–0.15 wt % Sc only weakly improve the mechanical properties of the alloys due to the refinement of beryllium-component grains. At high scandium contents, the strength increases insignificantly due to primary precipitation of ScBe13 and the plasticity decreases simultaneously.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119991, Russia

    L. V. Molchanova

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  1. L. V. Molchanova
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Correspondence to L. V. Molchanova.

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Original Russian Text © L.V. Molchanova, 2010, published in Metally, 2010, No. 5, pp. 69–72.

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Molchanova, L.V. Effect of scandium on the phase composition and mechanical properties of ABM alloys. Russ. Metall. 2010, 815–818 (2010). https://doi.org/10.1134/S0036029510090107

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