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This content will become publicly available on May 23, 2017

Title: Cerium-based, intermetallic-strengthened aluminum casting alloy: High-volume co-product development

Here, 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.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [1] ;  [1] ;  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Eck Industries, Manitowoc, WI (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Ames Lab., Ames, IA (United States)
Publication Date:
OSTI Identifier:
1346625
Report Number(s):
IS-J-8916; LLNL-JRNL-682237
Journal ID: ISSN 1047-4838; PII: 1943
Grant/Contract Number:
AC05-00OR22725; AC52-07NA27344; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 68; Journal Issue: 7; Journal ID: ISSN 1047-4838
Publisher:
Springer
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Laboratory Directed Research and Development (LDRD) Program
Contributing Orgs:
Eck Industries, Manitowoc, WI (United States); Ames Lab., Ames, IA (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; alloy; aluminum; rare earth; high temperature; cerium