, Volume 68, Issue 7, pp 1940–1947 | Cite as

Cerium-Based, Intermetallic-Strengthened Aluminum Casting Alloy: High-Volume Co-product Development

  • Zachary C. Sims
  • D. Weiss
  • S. K. McCall
  • M. A. McGuire
  • R. T. Ott
  • Tom Geer
  • Orlando Rios
  • P. A. E. Turchi


Several rare earth elements are considered by-products to rare earth mining efforts. By using one of these by-product elements in a high-volume application such as aluminum casting alloys, the supply of more valuable rare earths can be globally stabilized. Stabilizing the global rare earth market will decrease the long-term criticality of other rare earth elements. The low demand for Ce, the most abundant rare earth, contributes to the instability of rare earth extraction. In this article, we discuss a series of intermetallic-strengthened Al alloys that exhibit the potential for new high-volume use of Ce. The castability, structure, and mechanical properties of binary, ternary, and quaternary Al-Ce based alloys are discussed. We have determined Al-Ce based alloys to be highly castable across a broad range of compositions. Nanoscale intermetallics dominate the microstructure and are the theorized source of the high ductility. In addition, room-temperature physical properties appear to be competitive with existing aluminum alloys with extended high-temperature stability of the nanostructured intermetallic.


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Copyright information

© The Minerals, Metals & Materials Society (outside the U.S.) 2016

Authors and Affiliations

  • Zachary C. Sims
    • 1
  • D. Weiss
    • 2
  • S. K. McCall
    • 3
  • M. A. McGuire
    • 1
  • R. T. Ott
    • 4
  • Tom Geer
    • 1
  • Orlando Rios
    • 1
  • P. A. E. Turchi
    • 3
  1. 1.Oak Ridge National LaboratoryOak RidgeUSA
  2. 2.Eck IndustriesManitowocUSA
  3. 3.Lawrence Livermore National LaboratoryLivermoreUSA
  4. 4.Ames National LaboratoryAmesUSA

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