Structure and Mechanical and Corrosion Properties of a Magnesium Mg–Y–Nd–Zr Alloy after High Pressure Torsion
- Authors: Lukyanova E.A.1,2, Martynenko N.S.1,2, Serebryany V.N.1, Belyakov A.N.3, Rokhlin L.L.1, Dobatkin S.V.1,2, Estrin Y.Z.2,4
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Affiliations:
- Baikov Institute of Metallurgy and Materials Science
- Laboratory of Hybrid Nanostructured Materials
- Belgorod State University
- Monash University
- Issue: Vol 2017, No 11 (2017)
- Pages: 912-921
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/171810
- DOI: https://doi.org/10.1134/S0036029517110088
- ID: 171810
Cite item
Abstract
The structure and the properties of an Mg–Y–Nd–Zr alloy (WE43) are studied after high pressure torsion (HPT) in the temperature range 20–300°C. Structure refinement proceeds mainly by deformation twinning with the formation of a partial nanocrystalline structure with a grain size of 30–100 nm inside deformation twins. The WE43 alloy is shown to be aged during heating after HPT due to the decomposition of a magnesium solid solution. HPT at room temperature and subsequent aging causes maximum hardening. It is shown that HPT significantly accelerates the decomposition of a magnesium solid solution. HPT at all temperatures considerably increases the tensile strength and the yield strength upon tensile tests and significantly decreases plasticity. Subsequent aging additionally hardens the WE43 alloy. A potentiodynamic study shows that the corrosion resistance of this alloy after HPT increases. However, subsequent aging degrades the corrosion properties of the alloy.
About the authors
E. A. Lukyanova
Baikov Institute of Metallurgy and Materials Science; Laboratory of Hybrid Nanostructured Materials
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119991; Moscow, 119049
N. S. Martynenko
Baikov Institute of Metallurgy and Materials Science; Laboratory of Hybrid Nanostructured Materials
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119991; Moscow, 119049
V. N. Serebryany
Baikov Institute of Metallurgy and Materials Science
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119991
A. N. Belyakov
Belgorod State University
Email: dobatkin@imet.ac.ru
Russian Federation, Belgorod, 308015
L. L. Rokhlin
Baikov Institute of Metallurgy and Materials Science
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119991
S. V. Dobatkin
Baikov Institute of Metallurgy and Materials Science; Laboratory of Hybrid Nanostructured Materials
Author for correspondence.
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119991; Moscow, 119049
Yu. Z. Estrin
Laboratory of Hybrid Nanostructured Materials; Monash University
Email: dobatkin@imet.ac.ru
Russian Federation, Moscow, 119049; Melbourne, VIC, 3800