| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XIII
|
| Presentation Title |
EBSD Analysis of AA7075-T6 Thin Sheets Butt Joints Obtained by Impulse Friction Stir Welding |
| Author(s) |
Keqi Wang, Anton Naumov, Qibao Li, Baiyang Chen, Peihu Gao |
| On-Site Speaker (Planned) |
Keqi Wang |
| Abstract Scope |
Electron backscatter diffraction (EBSD) was used to study the microstructure characteristics of different zones in 7075-T6 aluminum alloy (AlZnMgCu1.5) joints produced by impluse friction stir welding (IFSW) and conventional friction stir welding (FSW). A fine-grained equiaxed microstructure was formed in the stir zones (SZ) of the joints. The grain size range of SZ-IFSW is 5.78~22.74 μm, the grain size range of SZ-FSW is 6.04~27.54 μm. The additional plastic deformation caused by the impulses is beneficial to grain refinement. The distribution ratios of low-angle grain boundaries (LAGBs) and high-angle grain boundaries (HAGBs) in the SZ of the studied joints were calculated. The introduction of impulses promotes continuous dynamic recrystallization in SZ, which allows the LAGBs to transform into HAGBs more effectively. The SZ and thermo-mechanically affected zone (TMAZ) of IFSW become wider under the additional plastic deformation. The results of microhardness distribution and tensile tests are presented and analyzed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Additive Manufacturing, Joining |