Journal of Materials Science

, Volume 47, Issue 2, pp 793–796 | Cite as

Quantitative metallographic assessment of the electromagnetic casting influence on the microstructure of 7075 Al alloy

  • Aleksandra Patarić
  • Marija Mihailović
  • Zvonko Gulišija
Article

Abstract

This study presents an attempt to obtain the better quality of an aluminum super-high strength alloy by application of electromagnetic field during the casting process. The conventional continuous casting process of aluminum alloys causes many defects, such as surface imperfections, grain boundary segregation, non-uniform grain size, and porosity. The better ingot surface along with the homogeneous fine-grained microstructure, and hence the better mechanical properties of the ingot, can be achieved by applying the electromagnetic casting process. The microstructure characterization, accompanied by quantitative metallographic assessment, reveals that it is possible to avoid or decrease many defects of as cast ingots during electromagnetic casting process. In this article, the microstructure of the samples of as cast 7075 aluminum alloy, obtained with and without electromagnetic field influence, was analyzed by optical microscope and the variation of key alloying elements content, i.e., Zn and Mg, through the ingot cross section was examined by chemical analysis. Besides, the microstructural parameters such as dendrite arm spacing, interdendritic space width, as well as eutecticum and intermetallic phases volume fraction, were measured using linear method. The electromagnetic field influence on the microstructure of the as cast 7075 Al alloy was evaluated based on measured quantitative metallographic data.

References

  1. 1.
    Zhihao Z, Jianzhong C, Jie D (2007) J Mater Process Technol 182:185CrossRefGoogle Scholar
  2. 2.
    Zhihao Z, Jianzhong C, Jie D, Zhefeng W (2005) J Alloy Compd 396:164CrossRefGoogle Scholar
  3. 3.
    Beijiang Z, Guimin L, Jianzhong C (2002) J Mater Sci Technol 18:401CrossRefGoogle Scholar
  4. 4.
    Zhang B, Cui J, Lu G, Zhang Q, Ban C (2003) Trans Nonferrous Met Soc China 13:158Google Scholar
  5. 5.
    Zhu Q, Zhao Y, Cui J, Zuo B, Qu F (2008) Acta Metall Sin 21:205CrossRefGoogle Scholar
  6. 6.
    Jie D, Jianzhong C, Fuxiao Y, Chunyan B, Zhihao Z (2004) Metall Mater Trans 35:2487CrossRefGoogle Scholar
  7. 7.
    Yubo Z, Jianzhong C, Jie D, Fuxiao Y (2005) J Alloy Compd 402:149CrossRefGoogle Scholar
  8. 8.
    Jie D, Cui J, Yu F, Zhao Z, Zhuo Y (2006) J Mater Process Technol 171:399CrossRefGoogle Scholar
  9. 9.
    Cui J, Zhang Z, Le Q (2010) Trans Nonferrous Met Soc China 20:2046CrossRefGoogle Scholar
  10. 10.
    Hao H, Zhang X, Park J, Kim H, Jin J (2003) J Mater Process Technol 142:526CrossRefGoogle Scholar
  11. 11.
    Cao Z, Jia F, Zhang X, Hao H, Jin J (2003) Mater Sci Eng A327:133Google Scholar
  12. 12.
    Zuo Y, Cui J, Zhao Z, Zhang H, Qin K (2005) Mater Sci Eng A 406:286CrossRefGoogle Scholar
  13. 13.
    Sug W, Hai H (2003) Mettal Mater Trans 34:1537CrossRefGoogle Scholar
  14. 14.
    Cui J, Zhang Z, Le Q (2010) Trans Nonferrous Met Soc China 20:s297CrossRefGoogle Scholar
  15. 15.
    Patarić A, Gulišija Z, Marković S (2007) Prakt Metallogr 44:290Google Scholar
  16. 16.
    Mapelli C, Gruttadauria A, Peroni M (2010) J Mater Process Technol 210:306CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Aleksandra Patarić
    • 1
  • Marija Mihailović
    • 1
  • Zvonko Gulišija
    • 1
  1. 1.Institute for Technology of Nuclear and Other Mineral Raw MaterialsBelgradeSerbia

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