About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
High-Strength Additively Manufacturable Al-Zr-Er-Ni Alloys with High As-Built Ductility |
| Author(s) |
S. Mohadeseh Taheri-Mousavi |
| On-Site Speaker (Planned) |
S. Mohadeseh Taheri-Mousavi |
| Abstract Scope |
Additively manufactured (AM) Al alloys with high as-built ductility offer higher fatigue and fracture behaviors in industrial applications. However, most commercial AM Al alloys have very limited ductility. Here we show that we analyzed the damage micro-mechanisms of a benchmark alloy (Al-1.0Zr-0.4Er-1.3Ni at. %). Using SEM, we revealed that Al3Zr and Al3Ni control cavity formation in as-built and after high-temperature heat treatment, respectively. With CALPHAD-based ICME simulations, we found that at each Er concentration, Zr and Ni must not exceed thresholds required to act as reservoirs for the L12 nanoprecipitates transformation (needed for high strength) during heat treatment. Following the guideline of Ni ≈ 0.6 % and Zr ≈ 1.1 × Er from simulations, an optimized composition of Al-0.5Zr-0.4Er-0.6Ni at. %, was designed. The as-built ductility increases to 19% from 0.9% by only sacrificing 25% of strength to achieve 267 MPa. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, ICME |