Industry designation of Al-Ce alloys

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The Aluminum Association, an industry leading voice, and an administrator of global standards for aluminum materials.
The Aluminum Association, an industry leading voice, and an administrator of global standards for aluminum materials.

CMI researchers at Oak Ridge National Laboratory and industry partner Eck conducted the research for this highlight

Innovation 
Cerium alloys with aluminum, yielding properties that qualify for big industrial applications with ramifications for rare earth economics.

Achievements
Three Al-Ce based alloys with exceptional properties, both cast and wrought, have been designated by The Aluminum Association, an administrator of global standards for aluminum materials. 

The NEW Designations are: 

  • 527: Al-Ce-Mg Cast
  • 8027: Al-Ce-Mg Wrought
  • 727: Al-Zn-Ce-Mg-Ni Cast

Significance and Impact

  • The designation sets standards for the alloys, giving them international recognition within the aluminum industry for technology adoption and commercial use at economically significant scale. 
  • Improved properties include corrosion resistance, elimination of heat treatment, increased strength at elevated temperature, and direct reduction of cerium carbonate and oxide in the melter.
  • Reduction in greenhouse gas emissions (processing, light-weighting).

Hub Goal Addressed 
Diversifying the supply of REE by increasing the value of co-mined cerium. Recovery and conversion of critical materials into high-value end products. Industry adoption of REE technology.
 

Left: AA727 casting of a high-temperature housing with complex geometry. Right: AA527 casting of an eight-cylinder engine block.
Left: AA727 casting of a high-temperature housing with complex geometry. Right: AA527 casting of an eight-cylinder engine block.