About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-22: Thermal Stability of Al-10Ce-4Mg Alloys Microalloyed with Zirconium |
| Author(s) |
Samuel Crowley, Humphrey Wara Odhiambo, Gaoyuan Ouyang |
| On-Site Speaker (Planned) |
Samuel Crowley |
| Abstract Scope |
Aluminum–cerium alloys exhibit excellent retention of mechanical properties at elevated temperatures due to the thermal stability of the Al₁₁Ce₃ intermetallic phase. This makes Aluminum–cerium alloys promising candidates for high-temperature lightweight structural applications. In the Al–10Ce–4Mg system, magnesium-containing phases provide additional strengthening but tend to coarsen or dissolve during thermal exposure, limiting long-term stability. This study investigates how microalloying with zirconium (0.25–1.0 wt.%) alters the aging behavior during prolonged thermal exposure at 300 °C. Zirconium was introduced using an arc-melted Zr–Cu eutectic master alloy, and samples were conventionally cast, solutionized, and aged for up to 100 h. Microstructural evolution and changes in mechanical hardness were evaluated using scanning electron microscopy and Vickers microhardness testing. Increasing zirconium content resulted in smaller changes in hardness after extended thermal exposure, consistent with zirconium influencing the coarsening behavior of magnesium and copper-containing strengthening phases. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Aluminum, High-Temperature Materials, Solidification |