| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation Induced Microstructural Modification
|
| Presentation Title |
Influence of Deformation on Microstructure of Al4Si and Cu4Nb Alloys during Friction Stir Processing: A Multi-modal Microstructural Characterization Study |
| Author(s) |
Julian Escobar, Bharat Gwalani, Matthew Olszta, Joshua Silverstein, Luciano Bergmann, Jorge dos Santos, Peter Staron, Emad Maawad, Benjamin Klusemann, Suveen Mathaudhu, Arun Devaraj |
| On-Site Speaker (Planned) |
Julian Escobar |
| Abstract Scope |
The mechanistic understanding of the influence of friction stir processing (FSP) on the microstructural modification of metallic alloys is still inadequate, due to the complex interplay of extreme strain and deformation induced heating. The microstructural changes from atomic to macroscale due to FSP can dramatically reduce grain size, increase the ductility to rupture and fatigue life of cast Al-Si and Cu4Nb alloys, making it crucial to decipher such deformation induced microstructural modification mechanisms. To achieve this goal, we used the FlexiStir friction stir and processing system to process Al4Si and Cu4Nb sheets, followed by detailed ex-situ synchrotron-based high-energy x-ray diffraction analysis, thermocalc predictions and electron microscopy. Our results provided new insights on the differences in lattice parameter and full-width-at-half-maximum of diffracted peaks, which could be correlated to the temperature and extent of shear deformation in the microstructure across base metal, heat affected zone, thermomechanically affected zone and stir zone. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Surface Modification and Coatings, Shaping and Forming |