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

TitleCerium-Based, Intermetallic-Strengthened Aluminum Casting Alloy: High-Volume Co-product Development
Publication TypeJournal Article
Year of Publication2016
AuthorsSims, ZC, Weiss, D, McCall, SK, McGuire, MA, Ott, RT, Geer, T, Rios, O, Turchi, PAE
Date Published07
Type of ArticleArticle
ISBN Number1047-4838
Accession NumberWOS:000379027100024
KeywordsMaterials Science, Metallurgical Engineering, Mineral Processing, Mineralogy, phase, precipitation, sc, si alloys

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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