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Development of Ultra-High Strength and Ductile Mg–Gd–Y–Zn–Zr Alloys by Extrusion with Forced Air Cooling

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Magnesium Technology 2017

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Magnesium alloys containing heavy rare earth metals (HRE) have been attracting wide attention due to their remarkable age-hardening response. Extrusion of Mg-HRE alloys generally requires high ram force, leading to heat generation during the extrusion. In this study, by simply utilizing forced air cooling, high strength Mg–8.2Gd–3.8Y–1Zn–0.4Zr (wt%) alloy with good ductility was successfully developed via tailoring the microstructure . The dynamic recrystallization (DRX) ratio, grain size and texture can be controlled by cooling during the extrusion process, that is, the forced air cooling reduces the extrusion temperature and brings about rapid cooling of the extrudate after extrusion. Consequently, the alloy extruded with forced air cooling exhibits high tensile yield strength of 378 MPa, ultimate tensile strength of 436 MPa and high elongation to failure of 12.5% due to a bimodal microstructure consisting of finer DRXed grains with relatively random orientations and coarse unrecrystallized grains with a strong basal fiber texture.

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References

  1. X.F. Huang et al., A transmission electron microscopy investigation of defects in an Mg-Cu-Mn-Zn-Y damping alloy. J. Alloy. Compd. 516, 186–191 (2012)

    Article  Google Scholar 

  2. L. Zheng et al., Microstructures and mechanical properties of Mg-10Gd-6Y-2Zn-0.6Zr (wt.%) alloy. J. Alloy. Compd. 509, 8832–8839 (2011)

    Article  Google Scholar 

  3. C. Xu et al., Microstructure and mechanical properties of rolled sheets of Mg–Gd–Y–Zn–Zr alloy: as-cast versus as-homogenized. J. Alloy. Compd. 528, 40–44 (2012)

    Article  Google Scholar 

  4. R. Wang et al., Microstructure and mechanical properties of rolled Mg-12Gd-3Y-0.4 Zr alloy sheets. Trans. Nonferrous Met. Soc. China 18, s189–s193 (2008)

    Article  Google Scholar 

  5. Y. Zhang et al., Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys. Mater. Sci. Eng. A 373, 320–327 (2004)

    Article  Google Scholar 

  6. M. Hirano et al., Effect of extrusion parameters on mechanical properties of Mg97Zn1Y2 alloys at room and elevated temperatures. Mater. Trans. 51, 1640–1647 (2010)

    Article  Google Scholar 

  7. T. Honma, N. Kunito, S. Kamado, Fabrication of extraordinary high-strength magnesium alloy by hot extrusion. Scripta Mater. 61, 644–647 (2009)

    Article  Google Scholar 

  8. M. Yamasaki et al., Effect of multimodal microstructure evolution on mechanical properties of Mg-Zn-Y extruded alloy. Acta Mater. 59, 3646–3658 (2011)

    Article  Google Scholar 

  9. T. Laser et al., The influence of calcium and cerium mischmetal on the microstructural evolution of Mg-3Al-1Zn during extrusion and resulting mechanical properties. Acta Mater. 56, 2791–2798 (2008)

    Article  Google Scholar 

  10. M. Chandrasekaran, Y.M.S. John, Effect of materials and temperature on the forward extrusion of magnesium alloys. Mater. Sci. Eng. A 381, 308–319 (2004)

    Article  Google Scholar 

  11. C. Xu et al., Microstructure and mechanical properties of the Mg–Gd–Y–Zn–Zr alloy fabricated by semi-continuous casting. Mater. Sci. Eng. A 549, 128–135 (2012)

    Article  Google Scholar 

  12. C. Xu et al., Effect of cooling rate on the microstructure evolution and mechanical properties of homogenized Mg-Gd-Y-Zn-Zr alloy. Mater. Sci. Eng. A 559, 364–370 (2013)

    Article  Google Scholar 

  13. M. Yamasaki et al., Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature. Acta Mater. 55, 6798–6805 (2007)

    Article  Google Scholar 

  14. Y. Jono, M. Yamasaki, Y. Kawamura, Effect of LPSO phase-stimulated texture evolution on creep resistance of extruded Mg-Zn-Gd alloys. Mater. Trans. 54, 703–712 (2013)

    Article  Google Scholar 

  15. J.D. Robson, Effect of extrusion conditions on microstructure, texture, and yield asymmetry in Mg-6Y-7Gd-0.5 wt%Zr alloy. Mater. Sci. Eng., A 528, 7247–7256 (2011)

    Article  Google Scholar 

  16. R. Alizadeh et al., An unusual extrusion texture in Mg-Gd-Y-Zn-Zr alloys. Adv. Eng. Mater. 18, 1044–1049 (2016)

    Article  Google Scholar 

  17. M.T. Perez-Prado, O.A. Ruano, Texture evolution during annealing of magnesium AZ31 alloy. Scripta Mater. 46, 149–155 (2002)

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by JSPS KAKENHI Grant Number JP 16K18266, Grant-in-Aid for Young Scientists (B) and JST, Advanced Low Carbon Technology Research and Development Program (ALCA), 12102886.

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Authors and Affiliations

  1. Research Center for Advanced Magnesium Technology, Nagaoka University of Technology, Nagaoka, 940-2188, Japan

    C. Xu, T. Nakata & S. Kamado

  2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    M. Y. Zheng

Authors
  1. C. Xu
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  2. T. Nakata
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  3. M. Y. Zheng
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  4. S. Kamado
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Corresponding author

Correspondence to C. Xu .

Editor information

Editors and Affiliations

  1. Arizona State University , Tempe, Arizona, USA

    Kiran N. Solanki

  2. Lund University , Lund, Skåne Län, Sweden

    Dmytro Orlov

  3. Structural Materials Unit, National Inst for Materials Sci Structural Materials Unit, Tsukuba, Ibaraki, Japan

    Alok Singh

  4. IND LLC , South Jordan, Utah, USA

    Neale R. Neelameggham

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© 2017 The Minerals, Metals & Materials Society

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Xu, C., Nakata, T., Zheng, M.Y., Kamado, S. (2017). Development of Ultra-High Strength and Ductile Mg–Gd–Y–Zn–Zr Alloys by Extrusion with Forced Air Cooling. In: Solanki, K., Orlov, D., Singh, A., Neelameggham, N. (eds) Magnesium Technology 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52392-7_7

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