About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Stress Relaxation Behavior in AA7075-T6 Sheet at 200 °C |
| Author(s) |
Daniel Nikolai, Eric M. Taleff |
| On-Site Speaker (Planned) |
Daniel Nikolai |
| Abstract Scope |
Recent studies demonstrated successful forming of AA7075-T6 sheet at 200 °C into a complex component with no visible defects. This process is termed retrogression forming. The potential for springback during retrogression forming depends strongly on stress relaxation, for which no previous data exist. Stress relaxation was measured at 200 °C in AA7075-T6 sheet following tensile deformation at two different strain rates, 3.2×10-2 and 3.2×10-3 s-1, to two different true strains, 0.05 and 0.1. Stress relaxed by as much as 45% while specimens were held at a constant strain following tensile deformation. Most stress relaxation occurred within the first 60 s after straining. The fastest strain rate produced the largest flow stress but, unexpectedly, also produced the lowest stress after relaxation. Strain in the range of 0.05 to 0.10 did not present a significant effect. Stress relaxation measurements and the mechanistic sources of stress relaxation will be discussed. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Other, |