About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
High Temperature Dynamic Behavior of Al-Zn-Mg-Cu Alloys Governed by Concurrent Phase and Microstructure Evolution |
| Author(s) |
Adam Seigler, Steven Mates, Hang Yu |
| On-Site Speaker (Planned) |
Adam Seigler |
| Abstract Scope |
The dynamic behavior of engineering alloys with complex, hierarchical microstructures is not well understood, especially at elevated temperatures where microstructural evolution during deformation adds complexity. This study investigates the dynamic response of precipitation-strengthened Al-Zn-Mg-Cu (AA7075) under high strain rates (10³–10⁴ s⁻¹) and temperatures approaching 80% of the melting point. Using rapid pulse-heated Kolsky bar experiments, we precisely control the thermal state to preserve the initial microstructure, enabling clear assessment of how temper conditions (solid solution, T6, T73) influence mechanical response. Key microstructural changes are revealed and quantified, guiding the development of a new physically inspired constitutive model. This model incorporates evolving structural features across multiple length scales—nano, micro, and meso—and provides improved predictive capability compared to conventional Sellars-Tegart and Johnson-Cook models. It offers new insight into the unified effects of strain rate and temperature across temper conditions in dynamically loaded aluminum alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Modeling and Simulation, |