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

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 ScBe 13 compound are i...

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Bibliographic Details
Published in:Russian metallurgy Metally 2010-09, Vol.2010 (9), p.815-818
Main Author: Molchanova, L. V.
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Aluminum base alloys
Beryllium base alloys
Chemistry and Materials Science
Intermetallic compounds
Magnesium
Materials Science
Mechanical properties
Metallic Materials
Scandium
Solid solutions
Solution strengthening
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Summary: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 ScBe 13 compound are in equilibrium with a beryllium solid solution (Be). Magnesium dissolves in both the aluminum component and the ScBe 13 compound. The strengthening effect related to the decomposition of the solid solution and the precipitation of Al 3 Sc 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 ScBe 13 and the plasticity decreases simultaneously.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029510090107