Abstract
The possibility of recovery in binary magnesium alloys with the yttrium group rare-earth metals (Y, Gd, Tb, Dy, Ho), in which the decomposition of a supersaturated magnesium solid solution at 200°C is accompanied by substantial hardening, is studied at an annealing temperature of 300°C. Annealing at 300°C of the alloys aged at 200°C to the state with the highest hardness results in significant recovery, which is much higher than the established recovery of these alloys at an annealing temperature of 250°C. The recovery regularly changes as a function of the atomic number of a rare-earth metal. Structural analysis of the alloys suggests that the phases formed in them during hardening aging are partly retained during the subsequent recovery, and no new phases form.
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Notes
Hereafter, the element contents are given in wt %.
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Funding
This work was performed according to state assignment no. 075-00746-19-00 and was partly supported by the Russian Foundation for Basic Research (project no. 18-03-00223).
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Translated by T. Gapontseva
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Rokhlin, L.L., Dobatkina, T.V., Tarytina, I.E. et al. Effect of the Annealing Temperature on the Aging-Induced Recovery in Magnesium Alloys with Rare-Earth Metals. Russ. Metall. 2020, 180–186 (2020). https://doi.org/10.1134/S0036029520030088
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DOI: https://doi.org/10.1134/S0036029520030088