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Russian Metallurgy (Metally)

, Volume 2019, Issue 5, pp 511–516 | Cite as

Aging-Induced Recovery of Magnesium Alloys with Various Rare-Earth Metals

  • L. L. RokhlinEmail author
  • T. V. Dobatkina
  • N. Yu. Tabachkova
  • E. A. Luk’yanova
  • I. E. Tarytina
Article
  • 1 Downloads

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.

Keywords:

magnesium alloys rare-earth metals aging recovery decomposition of solid solution 

Notes

FUNDING

This study was supported by the Russian Foundation for Basic Research (project no. 18-03-00223) and was performed in terms of state assignment no. 007-00129-18-00.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • L. L. Rokhlin
    • 1
    Email author
  • T. V. Dobatkina
    • 1
  • N. Yu. Tabachkova
    • 2
  • E. A. Luk’yanova
    • 1
    • 2
  • I. E. Tarytina
    • 1
  1. 1.Baikov Institute of Metallurgy and Materials Science, Russian Academy of sciencesMoscowRussia
  2. 2.National University of Science and Technology MISiSMoscowRussia

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