About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
The Efficacy of Replacing Metallic Cerium in Aluminum-cerium Alloys with LREE Mischmetal |
Author(s) |
Zachary Sims, David Weiss, Orlando Rios, Hunter Henderson, Michael Kesler, Scott K. McCall, Michael Thompson, Aurelien Perron, Emily E. Moore |
On-Site Speaker (Planned) |
Zachary Sims |
Abstract Scope |
The ongoing development of aluminum-cerium alloys has produced materials exhibiting elevated high temperature mechanical property retention, long term microstructural stability, and flexible processability compared to traditional aluminum alloys, accommodating the growing demand for high temperature aluminum alloys not requiring the use of high-cost elements like scandium. To date, reported Al-Ce alloy compositions contain large amounts of elemental cerium. Mischmetal (MM), a mixture of lanthanum, cerium, and other light rare earth elements (LREE) is less expensive and more available than pure cerium. The chemical similarity of the LREEs means there is possibility to use MM as the primary alloy addition, lowering alloy cost. This talk will report the effect of using MM in place of cerium in a 12 wt% binary alloy on mechanical properties, phase constituency, thermal stability, and load sharing. Results will show that MM can be substituted completely for cerium with a mostly positive impact on alloy performance. |
Proceedings Inclusion? |
Planned: Light Metals |