Groundbreaking temperature-resistant Al-REE alloy

Line graph shows trend for thermal coarsening at 300°C of Al-REE and high strength Al alloy 7075. The average size of strengthening particles in 7075 increases dramatically, reducing the hardness. In Al-REE, strengthening particle size and hardness are minimally changed by the same thermal exposure.
Thermal coarsening at 300°C of Al-REE and high strength Al alloy 7075. The average size of strengthening particles in 7075 increases dramatically, reducing the hardness. In Al-REE, strengthening particle size and hardness are minimally changed by the same thermal exposure. 

CMI researchers at Ames Laboratory, Lawrence Livermore National Laboratory, University of Tennessee, Knoxville and Eck Industries conducted the activity for this highlight

Innovation
Metal 3D printing of Aluminum-Rare Earth Element (Al-REE) alloy forms internal extremely degradation-resistant nanostructure. 

Achievement

  • Nanoscale particles form during 3D printing and resist coarsening during thermal exposure
  • Compares well to established high performance Al alloys.
  • Differences in particle connectivity and size can be controlled to alter mechanical behavior in the alloy.

Significance and Impact
Enhanced thermal performance makes these Al-REE alloys appropriate for high temperature applications previously impossible for Al, thereby helping increase demand for underutilized Ce.

Hub Target Addressed
Diversify supply of REE by increasing demand for C