| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
|
| Presentation Title |
Design of Additively Manufactured Al-Ni-Zr-Er Alloys with Enhanced Thermally Stable Strength and Ductility |
| Author(s) |
Zhaoxuan Ge, S. Mohadeseh Taheri-Mousavi |
| On-Site Speaker (Planned) |
Zhaoxuan Ge |
| Abstract Scope |
This study investigates a newly designed additively manufactured (AM) Al-Ni-Zr-Er alloy, exhibiting a yield strength of 400 MPa at peak aging and thermal stability at 400C. Tensile tests were performed on three aging conditions: as-built (most brittle), peak aging (highest yield strength), and 48-hour aging (most ductile). Examination of the microstructure at different aging times unveiled a metastable phase transformation from eutectic Al23Ni6Er4 to L12 nanoprecipitates, which has a finer size and significantly enhances material strength via the Orowan strengthening mechanism. This transformation unravels the changes in brittle to ductile behavior. The analyses of the fracture surfaces indicated the failure mainly occurred in Al3Ni-rich regions. EBSD was employed to assess strain partitioning and concentration within the microstructure. These findings are crucial for understanding the new Al-Ni-Zr-Er alloy system and highlight the potential of AM in engineering metastability to improve mechanical performance in high-temperature applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |