Aging-Induced Recovery of Magnesium Alloys with Various Rare-Earth Metals
- Authors: Rokhlin L.L.1, Dobatkina T.V.1, Tabachkova N.Y.2, Luk’yanova E.A.1,2, Tarytina I.E.1
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Affiliations:
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciences
- National University of Science and Technology MISiS
- Issue: Vol 2019, No 5 (2019)
- Pages: 511-516
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/173244
- DOI: https://doi.org/10.1134/S0036029519050082
- ID: 173244
Cite item
Abstract
The aging-induced recovery of binary magnesium alloys with various rare-earth metals (Y, Nd, Sm, Gd, Tb, Dy, Ho), in which the decomposition of the supersaturated magnesium solid solution is accompanied by substantial hardening, is studied. It is found that annealing of the alloys at 250°C, which were preliminary aged at 200°C to a peak hardness, leads to their softening; in this case, the hardness continues to decrease as the annealing time increases. Electrical resistivity measurements show that, as a result of annealing at 250°C, recovery takes place and is accompanied by partial dissolution of the decomposition products in the magnesium solid solution; after that, its decomposition continues. The degree of recovery in the alloys with yttrium-group rare-earth metals (Y, Gd, Tb, and Ho) is found to be higher than that for the alloys with cerium-group rare-earth metals (Nd and Sm); within the lanthanide series, the degree of recovery increases with the atomic number of a rare-earth metal.
About the authors
L. L. Rokhlin
Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciences
Author for correspondence.
Email: rokhlin@imet.ac.ru
Russian Federation, Moscow, 119334
T. V. Dobatkina
Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciences
Email: rokhlin@imet.ac.ru
Russian Federation, Moscow, 119334
N. Yu. Tabachkova
National University of Science and Technology MISiS
Email: rokhlin@imet.ac.ru
Russian Federation, Moscow, 119049
E. A. Luk’yanova
Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciences; National University of Science and Technology MISiS
Email: rokhlin@imet.ac.ru
Russian Federation, Moscow, 119334; Moscow, 119049
I. E. Tarytina
Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciences
Email: rokhlin@imet.ac.ru
Russian Federation, Moscow, 119334