Journal of Materials Science

, Volume 47, Issue 4, pp 2005–2010 | Cite as

Influence of Y on the phase composition and mechanical properties of as-extruded Mg–Zn–Y–Zr magnesium alloys

  • Jingfeng Wang
  • Pengfei Song
  • Shan Gao
  • Yiyun Wei
  • Fusheng Pan


The influence of Y on the microstructure, phase composition and mechanical properties of the extruded Mg–6Zn–xY–0.6Zr (x = 0, 1, 2, 3 and 4, in wt%) alloys has been investigated and compared by optical microscopy, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectrometer and tensile testing. The increase in Y content has shown grain refinement effects on the microstructure morphologies of the extruded alloys. However, when the content of Y exceeds 2.2 wt%, the grain refinement effect of the Y is not obvious any more with the increase of the Y content. The quasicrystal I-phase (Mg3YZn6), face-centred cubic structure W-phase (Mg3Y2Zn3) and a long period stacking ordered (LPSO) X-phase (Mg12YZn) can precipitate in different ranges of Y/Zn ratio (in at.%) when the Y content in the Mg–Zn–Y–Zr alloys is varied. Comparison of the mechanical properties of the alloys showed that the different ternary Mg–Zn–Y phases have different strengthening and toughening effects on the Mg–Zn–Y–Zr alloys in the following order: X-phase > I-phase > W-phase > MgZn2.


Magnesium Alloy Ultimate Tensile Strength Alloy Versus Refinement Effect Microstructure Morphology 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors are grateful for the financial support from Joint Foundation, National Natural Science Foundation Commission of China and China Academy of Engineering Physics (Grant No. 10876045), National Basic Research Program of China (Grant No. 2007CB613704), National Natural Science Foundation of China (Project No. 50725413), Project supported by Chongqing Science and Technology Commission (Project No. CSTS2008AB4114) and Fundamental Research Funds for the Central Universities (Project No. CDJZR10130012).


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jingfeng Wang
    • 1
    • 2
  • Pengfei Song
    • 1
  • Shan Gao
    • 1
  • Yiyun Wei
    • 1
  • Fusheng Pan
    • 1
    • 2
  1. 1.College of Materials Science and EngineeringChongqing UniversityChongqingPeople’s Republic of China
  2. 2.National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqingPeople’s Republic of China

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