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 PatarićEmail author
  • Marija Mihailović
  • Zvonko Gulišija


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.


Electromagnetic Field Main Operating Parameter Alloy Element Content Electromagnetic Casting Cumulative Distribution Curve 
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The authors wish to thank the financial support from the Ministry of Science and Technological Development of the Republic of Serbia through the project 34002.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

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

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