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Title: Casting Characteristics of High Cerium Content Aluminum Alloys

Authors:
 [1];  [2];  [2];  [3];  [4]
  1. Eck Industries
  2. ORNL
  3. Lawrence Livermore National Laboratory (LLNL)
  4. Ames Laboratory
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)
Sponsoring Org.:
Work for Others (WFO)
OSTI Identifier:
1348343
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: TMS 2017, San Diego, CA, USA, 20170226, 20170302
Country of Publication:
United States
Language:
English

Citation Formats

Weiss, David, Rios, Orlando, Sims, Zachary C, McCall, S. K., and Ott, Dr. Ryan T. Casting Characteristics of High Cerium Content Aluminum Alloys. United States: N. p., 2017. Web. doi:10.1007/978-3-319-51541-0_28.
Weiss, David, Rios, Orlando, Sims, Zachary C, McCall, S. K., & Ott, Dr. Ryan T. Casting Characteristics of High Cerium Content Aluminum Alloys. United States. doi:10.1007/978-3-319-51541-0_28.
Weiss, David, Rios, Orlando, Sims, Zachary C, McCall, S. K., and Ott, Dr. Ryan T. Sun . "Casting Characteristics of High Cerium Content Aluminum Alloys". United States. doi:10.1007/978-3-319-51541-0_28.
@article{osti_1348343,
title = {Casting Characteristics of High Cerium Content Aluminum Alloys},
author = {Weiss, David and Rios, Orlando and Sims, Zachary C and McCall, S. K. and Ott, Dr. Ryan T.},
abstractNote = {},
doi = {10.1007/978-3-319-51541-0_28},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}

Conference:
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  • This paper compares the castability of the near eutectic aluminum-cerium alloy system to the aluminum-silicon and aluminum-copper systems. The alloys are compared based on die filling capability, feeding characteristics and tendency to hot tear in both sand cast and permanent mold applications. The castability ranking of the binary Al–Ce systems is as good as the aluminum-silicon system with some deterioration as additional alloying elements are added. In alloy systems that use cerium in combination with common aluminum alloying elements such as silicon, magnesium and/or copper, the casting characteristics are generally better than the aluminum-copper system. In general, production systems formore » melting, de-gassing and other processing of aluminum-silicon or aluminum-copper alloys can be used without modification for conventional casting of aluminum-cerium alloys.« less
  • The research program investigates the casting characteristics of selected aluminum die casting alloys. Specifically, the alloys' tendencies towards die soldering and sludge formation, and the alloys' fluidity and machinability are evaluated. It was found that: When the Fe and Mn contents of the alloy are low; caution has to be taken against possible die soldering. When the alloy has a high sludge factor, particularly a high level of Fe, measures must be taken to prevent the formation of large hardspots. For this kind of alloy, the Fe content should be kept at its lowest allowable level and the Mn contentmore » should be at its highest possible level. If there are problems in die filling, measures other than changing the alloy chemistry need to be considered first. In terms of alloy chemistry, the elements that form high temperature compounds must be kept at their lowest allowable levels. The alloys should not have machining problems when appropriate machining techniques and machining parameters are used.« less
  • 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 mechanicalmore » 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.« less
  • 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 mechanicalmore » 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.« less