Rare Metals

, Volume 36, Issue 3, pp 188–192 | Cite as

Refining performance of Al–3Ti–0.2C–5Sr on A356 alloy and electron microanalysis of ternary Al–Ti–Sr phases

  • Hong-Liang Zhao
  • Chuan-Bin Zhang
  • Ya Gao
  • Qi-Yan Sun


The effect of Al–3Ti–0.2C–5Sr (wt%) grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope (OM). The morphology and crystal structure of ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner can promote the grain refining efficiency of A356 alloy. The ternary Al–Ti–Sr phases co-exist in two morphologies, i.e., blocky-like phase and surround-like phase, besides, which both have the same chemical composition of Al34Ti3Sr. The crystal structure of Al34Ti3Sr is face-centered cubic, and the lattice parameter is determined to be about 1.52 nm.


Grain refiner Aluminum alloy Al–Ti–Sr phase Microscopic morphology Crystal structure 



This study was financially supported by the National Natural Science Foundation of China (No. 51174177).


  1. [1]
    Faraji M, Katgerman L. Distribution of trace elements in a modified and grain refined aluminium–silicon hypoeutectic alloy. Micron. 2010;41(6):554.CrossRefGoogle Scholar
  2. [2]
    Bieol Y. AlB3 master alloy to grain refine AlSi10Mg and AlSi12Cu aluminium foundry alloys. J Alloy Compd. 2012;513(2):150.Google Scholar
  3. [3]
    Kori SA, Chandrashekharaish TM. Studies on the dry sliding wear behavior of hypoeutectic and eutectic Al–Si alloys. Wear. 2007;263(1–6):745.CrossRefGoogle Scholar
  4. [4]
    Wang SR, Ma R, Wang YZ. Growth mechanism of primary silicon in cast hypoeutectic Al–Si alloys. Trans Nonferr Metals Soc China. 2012;22(6):1264.CrossRefGoogle Scholar
  5. [5]
    Zhang L, Dong XP, Li JQ. Microstructure evolution of Al–Si semi-solid slurry by gas bubble stirring method. J Central South Univ Technol. 2011;18(6):1789.CrossRefGoogle Scholar
  6. [6]
    Gezer BT, Toptan F, Daglilar S. Production of Al–Ti–C grain refiners with the addition of elemental carbon. Mater Des. 2010;31(1):S30.CrossRefGoogle Scholar
  7. [7]
    Xing PF, Gao B, Zhuang YX. Effect of erbium on properties and microstructure of Al–Si eutectic alloy. J Rare Earths. 2010;28(6):927.CrossRefGoogle Scholar
  8. [8]
    Li PT, Liu SD, Zhang LL, Liu XF. Grain refinement of A356 alloy by Al–Ti–B–C master alloy and its effect on mechanical properties. Mater Des. 2013;47:522.CrossRefGoogle Scholar
  9. [9]
    Vinod Kumar GS, Murty BS, Chakraborty M. Grain refinement response of LM25 alloy towards Al–Ti–C and Al–Ti–B grain refiners. J Alloys Compd. 2009;472(1-2):112–20.CrossRefGoogle Scholar
  10. [10]
    Shankar S, Riddle YW, Makhlouf MM. Nucleation mechanism of the eutectic phases in aluminum-silicon hypoeutectic alloys. Acta Materialis. 2004;52(15):4447.CrossRefGoogle Scholar
  11. [11]
    Ferrarini CF, Bolfarini C, Kiminami CS, Botta WJ. Microstructure and mechanical properties of spray deposited hypoeutectic Al–Si alloy. Mater Sci Eng A. 2004;375–377(1–2):577.CrossRefGoogle Scholar
  12. [12]
    Zhao HL, Bai HL, Wang J, Guan SK. Preparation of Al–Ti–C–Sr master alloys and their refining efficiency on A356 alloy. Mater Charact. 2009;60(5):377.CrossRefGoogle Scholar
  13. [13]
    Zhao HL, Wang J, Song Y, Guan SK. Microstructure and synthesis mechanism of Al–Ti–C–Sr master alloy. Trans Nonferr Metals Soc China. 2010;20(5):751.CrossRefGoogle Scholar
  14. [14]
    Zhang CB, Wielunski L, Willis BG. Formation of strontium template on Si(100) by atomic layer deposition. Appl Surf Sci. 2011;257(11):4826.CrossRefGoogle Scholar
  15. [15]
    Wang J. Study on formation mechanism and grain refining performance of the Al–Ti–C–Sr master alloy. Zhengzhou: Zhengzhou University; 2009. 30.Google Scholar

Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Hong-Liang Zhao
    • 1
  • Chuan-Bin Zhang
    • 2
  • Ya Gao
    • 1
  • Qi-Yan Sun
    • 1
  1. 1.College of Materials Science and EngineeringZhengzhou UniversityZhengzhouChina
  2. 2.Department of Mechanical and Electrical EngineeringXuchang Vocational Technical CollegeXuchangChina

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