| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Evolution of Microstructure Near Crack Tips in High-Strength Aluminum Alloy AA7075-T6 Sheet at 200 ºC |
| Author(s) |
Daniel Nikolai, Eric M. Taleff |
| On-Site Speaker (Planned) |
Daniel Nikolai |
| Abstract Scope |
The microstructure of AA7075-T6 sheet was characterized in the as-received condition and near a crack tip in material subjected to ductile tearing at 200 ºC. Characterization techniques used included optical microscopy (OM), scanning electron microscopy (SEM), and x-ray computed tomography (XRCT). Each technique revealed anisometry of microstructural features, with features generally aligned along the sheet rolling direction. Cavities and multiple classes of large constituent particles were segmented in data from the as-received material using a correlative microscopy (CM) technique. From CM data, two-point correlations were calculated between constituent particle classes and cavities to quantify spatial relationships between them. Feature content measurements were compared between OM, CM, and XRCT techniques to verify the efficacy of each. Microstructures near crack tips were characterized from segmented XRCT data. These data demonstrated cavity growth and interlinkage during ductile tearing at 200 ºC, with a stronger correlation between constituent particles and cavities near crack tips. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, |