| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics and Kinetics of Alloys III
|
| Presentation Title |
Understanding the Thermodynamics and Kinetics of Microstructural Evolution and Resultant Mechanical Properties of Friction Stir Processed Al7xxx Alloy |
| Author(s) |
Arun Devaraj, Zehao Li, Tingkun Liu, Rakesh Kamath, Hrishikesh Das, Shivakanth Shukla, Dileep Singh, Mert Efe, Piyush Upadhyay |
| On-Site Speaker (Planned) |
Arun Devaraj |
| Abstract Scope |
Replacing steel and heavier alloys with lightweight, high-strength Aluminum 7xxx series alloys in electric vehicle battery trays can significantly increase driving range. However, their adoption is limited by low ductility and formability at room temperature. Friction stir processing (FSP) offers a unique solution to enhance formability of the alloy locally where desired. Effective FSP use demands understanding the alloy's thermodynamics, kinetics, and the processing-microstructure-property relationship. Our study examined the microstructural evolution and strain-hardening of a peak-aged Al-5.5Zn-2.4Mg-1.4Cu alloy through FSP. Using electron backscattered diffraction, transmission electron microscopy, atom probe tomography, and in situ synchrotron X-ray diffraction, we revealed significant grain refinement and the dissolution of large dispersoids and η' precipitates. These findings showed changes in deformation mechanisms pre- and post-FSP processing. This research highlights FSP's potential to tailor the microstructure and mechanical properties of high-strength Al alloys, enhancing their use in automotive lightweighting and boosting electric vehicle performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Characterization, Phase Transformations |