| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Kinetics of Alloys II
|
| Presentation Title |
Multi-Objective Design of a 7xxx High Strength Aluminum Plate Alloy |
| Author(s) |
Maria-Ioanna T. Tzini, Gregory B. Olson |
| On-Site Speaker (Planned) |
Maria-Ioanna T. Tzini |
| Abstract Scope |
The new generation of 7xxx high strength Al thick plates are mainly used as structural and framework components in aerospace and defense industry. The need to fabricate large-scale products with reduced cost via conventional ingot casting and wrought processing constitutes a design challenge. In the present study, a hierarchical system approach is employed using CALPHAD-based ICME computational tools and multi-objective optimization techniques to accelerate the design of a 750 MPa yield strength Al plate alloy with 10 cm thickness that combines strength, ductility, quench sensitivity resistance, and intergranular stress corrosion cracking resistance (SCC). A precipitation strengthening model is developed to describe the hardening behavior at peak aging conditions and kinetic calculations are performed to investigate quench-rate resistivity upon cooling. High-throughput DFT-FLAPW data combined with thermodynamic tools were employed for the design against SCC. The strengthening model was experimentally validated and the trade-off among property objectives is identified. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Computational Materials Science & Engineering, Aluminum |