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Structure and Mechanical and Corrosion Properties of a Magnesium Mg–Y–Nd–Zr Alloy after High Pressure Torsion

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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.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 119991, Russia

    E. A. Lukyanova, N. S. Martynenko, V. N. Serebryany, L. L. Rokhlin & S. V. Dobatkin

  2. Laboratory of Hybrid Nanostructured Materials, National University of Science and Technology MISiS, Moscow, 119049, Russia

    E. A. Lukyanova, N. S. Martynenko, S. V. Dobatkin & Yu. Z. Estrin

  3. Belgorod State University, Belgorod, 308015, Russia

    A. N. Belyakov

  4. Monash University, Melbourne, VIC, 3800, Australia

    Yu. Z. Estrin

Authors
  1. E. A. Lukyanova
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  2. N. S. Martynenko
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  3. V. N. Serebryany
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  4. A. N. Belyakov
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  5. L. L. Rokhlin
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  6. S. V. Dobatkin
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  7. Yu. Z. Estrin
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Correspondence to S. V. Dobatkin.

Additional information

Original Russian Text © E.A. Lukyanova, N.S. Martynenko, V.N. Serebryany, A.N. Belyakov, L.L. Rokhlin, S.V. Dobatkin, Yu.Z. Estrin, 2017, published in Metally, 2017, No. 6, pp. 11–22.

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Lukyanova, E.A., Martynenko, N.S., Serebryany, V.N. et al. Structure and Mechanical and Corrosion Properties of a Magnesium Mg–Y–Nd–Zr Alloy after High Pressure Torsion. Russ. Metall. 2017, 912–921 (2017). https://doi.org/10.1134/S0036029517110088

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  • DOI: https://doi.org/10.1134/S0036029517110088

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