Effect of Al–Er–Zr Master Alloy on Grain Refinement After Heat Treatment

  • Haiyue YuEmail author
  • Hui Huang
  • Zuoren Nie
  • Shengping Wen
  • Kunyuan Gao
  • Wei Wang
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 217)


The effects of Al–0.5Er–0.2Zr and Al–1Er–0.25Zr (wt%) alloys on the grain size of high-purity aluminum after isothermal aging at 450 °C were studied by micro-hardness, scanning electron microscopy (SEM), optical microscopy, and transmission electron microscope (TEM). The experimental results showed that the Al3Er secondary phases precipitated uniformly after isothermal aging of Al–0.5Er–0.2Zr alloy. The content of Er element in Al–1Er–0.25Zr alloy was much larger than the maximum equilibrium solid solubility in aluminum. The primary phase was densely distributed in the matrix. In addition, a large number of Al3Er and Al3 (Er, Zr) phases matched with the matrix lattice have been precipitated during heat treatment. The heat-treated master alloys were added to the high-purity aluminum liquid, and the nucleation sites were provided by the micron-sized and nano-sized precipitation phases. At last, the average grain size obtained by the refinement experiment was less than 300 μm. At the same time, the reasons for the refinement effect of the interaction between Er and Zr elements were preliminarily analyzed.


Aluminum alloy Master alloy Grain refinement Rare earths 



The authors are pleased to acknowledge financial support received from the following projects (in no particular order). The National Key Research and Development Program of China (2016YFB0300804 and 2016YFB0300801), and the National Natural Science Fund for Innovative Research Groups (Grant No. 51621003). The Construction Project for National Engineering Laboratory for Industrial Big-data Application Technology (312000522303). National Natural Science Foundation of China (No. 51671005 and 51701006), Beijing Natural Science Foundation (2162006) and Program on Jiangsu Key Laboratory for Clad Materials (BM2014006).


  1. 1.
    T.E. Quested, Understanding mechanisms of grain refinement of aluminium alloys by inoculation. Mater. Sci. Technol. 20, 1357–1369 (2004)CrossRefGoogle Scholar
  2. 2.
    L. Sturz, A. Drevermann, C. Pickmann, G. Zimmermann, Influence of grain refinement on the columnar-to-equiaxed transition in binary Al alloys. Mater. Sci. Eng. A, 413, 379 (2005)CrossRefGoogle Scholar
  3. 3.
    Z. Gao, The world aluminum grain refiner supply industry (1). Light Met. (9), 50–53 (1999)Google Scholar
  4. 4.
    D.H. Stjohn, M. Qian, M.A. Easton et al., The interdependence theory: the relationship between grain formation and nucleant selection. Acta Mater. 59(12), 4907–4921 (2011)CrossRefGoogle Scholar
  5. 5.
    B.S. Murty, S.A. Kori, M. Chakraborty, Grain refinement of aluminium and its alloys by heterogeneous nucleation and alloying. Int. Mater. Rev. 47, 3 (2002)CrossRefGoogle Scholar
  6. 6.
    Y.D. He, X.M. Zhang, Z.Q. Cao, Effect of minor Cr, Mn, Zr, Ti and B on grain refinement of as-cast Al-Zn-Mg-Cu alloys. Rare Met. Mater. Eng. 39, 1135 (2010)CrossRefGoogle Scholar
  7. 7.
    Z. Fan, Y. Wang, Y. Zhang et al., Grain refining mechanism in the Al/Al–Ti–B system. Acta Mater. 84, 292–304 (2015)CrossRefGoogle Scholar
  8. 8.
    Z.R. Nie, S.P. Wen, H. Hui et al., Research progress of Er-containing aluminum alloy. Chin. J. Nonferrous Met. 21(10), 2361–2370 (2011)Google Scholar
  9. 9.
    Z.-r. Nie, The effect and progress of alloying elements in aluminium. China Nonferrous Met. 22, 56–57 (2009)Google Scholar
  10. 10.
    Z.R. Nie, T.N. Jin, J.B. Fu, G.F. Xu, J.J. Yang, J.X. Zhou, T.Y. Zuo, Research on rare earth in aluminum. Mater. Sci. Forum 396(402), 1731–1736 (2002)CrossRefGoogle Scholar
  11. 11.
    Z.R. Nie, B.L. Li, W. Wang, T.N. Jin, H. Huang, H.M. Li, J.X. Zou, T.Y. Zuo, Study on the erbium strengthened aluminum alloy. Mater. Sci. Forum 546(549), 623–628 (2007)CrossRefGoogle Scholar
  12. 12.
    F. Wang, D. Qiu, Z.L. Liu et al., The grain refinement mechanism of cast aluminium by zirconium. Acta Mater. 61(15), 5636–5645 (2013)CrossRefGoogle Scholar
  13. 13.
    S.P. Wen, K.Y. Gao, H. Huang, Z.R. Nie, Synergetic effect of Er and Zr on the precipitation hardening of Al-Er-Zr alloy. Scr. Mater. 65, 592–595 (2011)CrossRefGoogle Scholar
  14. 14.
    S.P. Wen, Z.B. Xing, H. Huang, B.L. Li, W. Wang, Z.R. Nie, The effect of erbium on the microstructure and mechanical properties of Al-Mg-Mn-Zr alloy. Mater. Sci. Eng. A 516, 42–49 (2009)CrossRefGoogle Scholar
  15. 15.
    H. Li, B. Jie, J. Liu et al., Precipitation evolution and coarsening resistance at 400 °C of Al microalloyed with Zr and Er. Scr. Mater. 67(1), 73–76 (2012)CrossRefGoogle Scholar
  16. 16.
    Z.-b. Xin, Z.-r. Nie, J.-x. Zou, X.-d. Gao, Form and effect of element Er in Al-Er alloy cast ingot. J. Chin. Rare Earths Soc. 25(2), 234–238 (2007)Google Scholar
  17. 17.
    J.-j. Yang, Z.-r. Nie, T.-n. Jin, G.-f. Xu, J.-b. Fu, H.-q. Ruan, T.-y. Zuo, Effect of trace rare earth element Er on high pure Al. Trans. Nonferrous Met. Soc. China 13(5), 1035–1039 (2003)Google Scholar
  18. 18.
    G.-f. Xu, Z.-r. Nie, T.-n. Jin, J.-j. Yang, J.-b. Fu, Z.-m. Yin, Effects of trace erbium on casting microstructure of LF3 Al alloy. J. Chin. Rare Earth Soc. 20(2), 143–145 (2002)Google Scholar
  19. 19.
    B. Gong, S.-p. Wen, H. Huang, Z.-r. Nie, Evolution of nanoscale Al3(Er1−xZrx) precipitates in Al-6Mg-0.7Mn-0.1Zr-0.3Er alloy during annealing. Acta Metall. Sin. 46(7), 850–856 (2010)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Haiyue Yu
    • 1
    Email author
  • Hui Huang
    • 1
  • Zuoren Nie
    • 1
  • Shengping Wen
    • 1
  • Kunyuan Gao
    • 1
  • Wei Wang
    • 1
  1. 1.School of Materials Science and EngineeringBeijing University of TechnologyBeijingPeople’s Republic of China

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