About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Additive Manufacturing of Lightweight Alloy Matrix Composites
|
| Presentation Title |
Additive Manufacturing of High-Strength 2024 Aluminum Alloy with Enhanced Thermal Stability via Nano-Treating |
| Author(s) |
Tianqi Zheng, Guan-Cheng Chen, Mengchen Li, Alexander Killips, Bingbing Li, Morris Yinmin Wang, Xiaochun Li |
| On-Site Speaker (Planned) |
Alexander Killips |
| Abstract Scope |
Laser powder bed fusion (LPBF) of AA2024 is hindered by hot cracking and poor thermal stability. Here, we demonstrate that LPBF of TiC nanoparticle-dispersed AA2024 (2024NT) overcomes these issues, yielding crack-free parts (<0.5% porosity) through optimized processing conditions. Post-heat-treated 2024NT (2024NT-T4) exhibits ~34% higher yield strength and ~17% higher UTS at room temperature versus conventional 2024-T4, while maintaining ductility. Moreover, 2024NT-T4 retains elevated strength up to 200 °C and shows markedly improved creep resistance at 150–250 °C. We attribute these gains to nanoparticle-induced stabilization of precipitates and grain structure, which suppresses coarsening and dislocation motion at high temperature. In addition, the dispersed TiC nanoparticles impede dislocation propagation during high temperature deformation and further enhancing creep resistance. These results establish a pathway for producing high-strength, thermally stable AA2024 components via additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, |