Journal of Materials Science

, Volume 47, Issue 10, pp 4290–4298 | Cite as

Precipitation of iron-rich intermetallic phases in Al-4.6Cu-0.5Fe-0.5Mn cast alloy



The solidification of Al-4.6Cu-0.5Fe-0.5Mn (206 type) cast alloy has been studied using Thermal Analysis, Differential Scanning Calorimeter, Scanning Electron Microscopy, Electron Back-Scattered Diffraction (EBSD), and Transmission Electron Microscopy (TEM). It is interesting to note that an iron-rich intermetallic phase, Al3(FeMn), is experimentally observed to be dominantly present in the fully solidified cast structure of the experimental 206 cast alloy, in addition to β-Fe (Al7Cu2(FeMn)/Al7Cu2Fe) phase. Al3(FeMn) phase is formed through a eutectic reaction approximately at 640 °C during solidification, possibly resulting from the phase selection and segregation of Fe in liquid Al. The presence of the Al3(FeMn) phase has been confirmed by both EBSD and TEM. It is also found that both β-Fe and Al6(FeMn) are possible to nucleate on Al3(FeMn), as confirmed by the calculated low planar disregistries. The possible solidification reactions have been established for 206-type cast alloy at 0.5%Fe.


Energy Dispersion Spectroscopy Cast Alloy Experimental Alloy Chinese Script Energy Dispersion Spectroscopy Result 
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 would like to acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Rio Tinto Alcan, through the NSERC Industry Research Chair in Metallurgy of Aluminum Transformation at the University of Québec at Chicoutimi.


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© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.University of Québec at ChicoutimiChicoutimiCanada
  2. 2.Aerospace Manufacturing Technology CenterInstitute for Aerospace Research, National Research Council CanadaMontrealCanada
  3. 3.Department of Applied ScienceUniversity of Québec at ChicoutimiChicoutimiCanada

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