Effect of shoulder shape on axial force of friction stir welding of 6061 aluminum alloy

NIU Wentao; XIE Jilin; HUANG Yongde; ZHANG Hao; CHEN Yuhua

doi:10.12073/j.hjxb.20201210001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2021 > 42(7): 66-73. > DOI: 10.12073/j.hjxb.20201210001

NIU Wentao, XIE Jilin, HUANG Yongde, ZHANG Hao, CHEN Yuhua. Effect of shoulder shape on axial force of friction stir welding of 6061 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(7): 66-73. DOI: 10.12073/j.hjxb.20201210001

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Effect of shoulder shape on axial force of friction stir welding of 6061 aluminum alloy

1.
Jiangxi Key Laboratory of Forming and Joining Technology for Aviation Aerospace Components, Nanchang Hangkong University, Nanchang, 330000, China
2.
Harbin Institute of Technology, Harbin, 150001, China
3.
Passenger Car Fujian Branch of SAIC Motor Corporation Limited, Ningde, 352000, China

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Received Date: December 09, 2020
Available Online: August 30, 2021

Graphical Abstract

Abstract

Abstract

For the application of robotic FSW, the influence of shoulder shape on axial force during welding was researched. FSW of 6061-T6 aluminum alloy was successfully performed by tools with different shoulder shape of flat and concave. The axial force during welding was measured, recorded, and analyzed. The distribution and variation of axial force were analyzed comprehensively with the aid of an established stress model about the shoulder. The results were shown that weld morphology of the flat shoulder was better than that of the concave shoulder. The average axial force curve fluctuated zigzag in the stable welding stage, while the amplitude of zigzag with the flat shoulder was smaller than the concave shoulder. The lowest axial force was measured in rotating speed of 1 500 r/min and the welding speed of 95 mm/min, when the flat shoulder was used, the lowest axial force was 3 828 N, and the concave shoulder was 4 018.5 N. It was attributed of the lower heat input produced welding with concave shoulder and greater resistance to plastic flow of material. In addition, according to the force analysis, when the concave shoulder was used for welding, a certain axial force was added by the movement in the forward direction, which resulted in a larger axial force.
- friction stir welding,
- 6061-T6 aluminum alloy,
- shoulder shape,
- axial force

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References (23)

References

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Effect of shoulder shape on axial force of friction stir welding of 6061 aluminum alloy