Journal
WELDING IN THE WORLD
Volume 67, Issue 2, Pages 385-393Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s40194-022-01421-2
Keywords
Al-Mg-Li alloy; Refill friction stir spot welding; Lap shear strength; Cross tension strength; Fracture mode
Categories
Ask authors/readers for more resources
This study successfully lap welded 1.5-mm thick Al-Mg-Li alloy plates using refill friction stir spot welding (RFSSW). The microstructure investigation revealed the occurrence of dynamic recrystallization (DRX) in the stir zone (SZ) of the joint, resulting in fine equiaxed grains. The mechanical properties of the joints were influenced by void defect at the horizontal surface and lack of mixing defect at the vertical interface.
1.5-mm thick Al-Mg-Li alloy plates were successfully lap welded using refill friction stir spot welding (RFSSW), and the microstructure and mechanical properties of the joints were investigated. The results show that dynamic recrystallization (DRX) has occurred in the stir zone (SZ) of the joint, forming fine equiaxed grains with an average size of 10 mu m. There is a strong texture in the base material, while no obvious texture in the SZ. The void defect at the horizontal surface and the lack of mixing defect at the vertical interface are the most important factor influencing the lap shear strength and the cross tension strength, respectively. The maximum lap shear strength is 6.2 kN, and the maximum cross tension strength is 2.7 kN. In addition, there are three fracture modes that can be observed after the tensile-shear tests, i.e., parent sheet fracture, plug type fracture, and interface fracture, while only plug type fracture mode presents after the cross tension tests.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available