The Structure and Mechanical Properties of Rolled Sheets of the Multicomponent Al–2.5Ca–2.5Mg Alloy Doped with Scandium and Zirconium

Using the Al–2.5% Mg–1% Mn–0.4% Fe base alloy (wt %) as an example, the effects of calcium, scandium, and zirconium additives (at about 2.5, 0.1, and 0.2 wt %, respectively) on the strength of rolled sheets has been studied. Ingots of the alloy of the chosen composition and the hot and cold rolled s...

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Bibliographic Details
Published in:Physics of metals and metallography 2023-07, Vol.124 (7), p.692-697
Main Authors: Doroshenko, V. V., Naumova, E. A., Aksenov, A. A., Shcherbakova, O. O., Finogeev, A. S.
Format: Article
Language:English
Subjects:
Additives
Alloys
Aluminum
Annealing
Calcium zirconate
Chemistry and Materials Science
Cold rolling
Composition
Diffusion
Ferrous alloys
Inclusions
Ingot casting
Ingots
Iron
Magnesium
Manganese
Materials Science
Mechanical properties
Metallic Materials
Nanoparticles
Phase Transformations
Quench hardenability
Rare earth metals
Scandium
Specialty metals industry
Structure
Thermal stability
Zirconium
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Summary:Using the Al–2.5% Mg–1% Mn–0.4% Fe base alloy (wt %) as an example, the effects of calcium, scandium, and zirconium additives (at about 2.5, 0.1, and 0.2 wt %, respectively) on the strength of rolled sheets has been studied. Ingots of the alloy of the chosen composition and the hot and cold rolled sheets obtained from them were used as objects for the experimental study. Based on microstructural studies, it is shown that calcium binds iron into compact inclusions (presumably, into the Al 10 CaFe 2 phases), which has a positive effect on the mechanical properties of the alloy, as well as on the technological plasticity during the rolling operation. Zirconium and scandium additives make it possible to form thermally stable nanoparticles of the Al 3 (Zr, Sc)– L 1 2 phase, which is favorable for maintaining a partially unrecrystallized structure in cold rolled sheets during annealing at least up to 400°C. Using the alloy of the selected composition as an example, the fundamental possibility for producing sheet products from cast (unhomogenized) ingots with the properties of thermally hardenable alloys of the Al–Si–Mg–Mn and Al–Zn–(4.5)Mg–(1.5)Mn types without using quenching has been demonstrated.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X2360080X