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Microstructures and mechanical properties of Mg–Zn–Y alloy consolidated from gas-atomized powders using high-pressure torsion

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Abstract

In this paper, rapid solidified Mg95Zn4.3Y0.7 (at.%) alloy powders produced by an inert gas atomizer were consolidated using a severe plastic deformation technique of high pressure torsion (HPT) at room temperature and 373 K. The behavior of powder consolidation, matrix microstructural evolution, and mechanical properties of the powders and compacts were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, microhardness, and tensile testing. As the HPT processing temperature increases, the powders are more plastically deformed due to decreased deformation resistance, grain boundaries are more in equilibrium, powder bonding is enhanced due to increased interparticle diffusion, hence, tensile ductility and strength increases. On the other hand, hardness decreases with the increased processing temperature, due to less dislocation density.

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Acknowledgements

This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-0026981).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, POSTECH, Pohang, 790-784, Korea

    Eun Yoo Yoon, Dong Jun Lee, Sunghak Lee & Hyoung Seop Kim

  2. Department of Rare Metals, Korea Institute of Industrial Technology, Incheon, 406-130, Korea

    Taek-Soo Kim & Hong Jun Chae

  3. Department of Materials Physics, Eötvös Loránd University, Budapest, P.O.B. 32, 1518, Hungary

    P. Jenei, Jeno Gubicza & Tamas Ungár

  4. Department of Metal Physics, Charles University, 121 16, Prague 2, Czech Republic

    Milos Janecek & Jitka Vratna

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  1. Eun Yoo Yoon
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  2. Dong Jun Lee
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  11. Hyoung Seop Kim
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Correspondence to Hyoung Seop Kim.

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Yoon, E.Y., Lee, D.J., Kim, TS. et al. Microstructures and mechanical properties of Mg–Zn–Y alloy consolidated from gas-atomized powders using high-pressure torsion. J Mater Sci 47, 7117–7123 (2012). https://doi.org/10.1007/s10853-012-6408-0

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  • DOI: https://doi.org/10.1007/s10853-012-6408-0

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