Metallurgical and Materials Transactions A

, Volume 50, Issue 12, pp 5945–5956 | Cite as

A Formation Map of Iron-Containing Intermetallic Phases in Recycled Cast Aluminum Alloys

  • E. Cinkilic
  • C. D. Ridgeway
  • X. Yan
  • A. A. LuoEmail author


The cooling rate-dependent modification effect of Mn on the formation of Fe-containing intermetallic phases during solidification of Al-Si-Mg secondary cast aluminum alloys [containing 0.5 to 1 pct Fe (All compositions are in wt pct unless otherwise stated.)] was investigated by CALculation of PHAse Diagrams (CALPHAD) modeling and solidification experiments. The critical Mn concentration required to prevent the formation of detrimental β-Al5FeSi was found to be dependent on both the alloy composition (particularly the Fe/Mn ratio) and the cooling rate. A map of Fe/Mn ratio vs cooling rate was created, to summarize the metallurgical conditions of Fe-rich intermetallic phase formation. By understanding such formation conditions, the microstructure of aluminum castings can be controlled to create low-cost secondary alloys with high Fe content.



The authors would like to acknowledge the National Science Foundation for supporting this work (Award CMMI-1432688). Dr. Yeou-Li Chu and Mr. Patrick Cheng of Ryobi Die Casting are also acknowledged for helpful discussions.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • E. Cinkilic
    • 1
  • C. D. Ridgeway
    • 1
  • X. Yan
    • 2
  • A. A. Luo
    • 1
    • 3
    Email author
  1. 1.Department of Materials Science & EngineeringThe Ohio State UniversityColumbusUSA
  2. 2.Alcoa Technical CenterNew KensingtonUSA
  3. 3.Department of Integrated Systems EngineeringThe Ohio State UniversityColumbusUSA

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