Study on the fatigue performance of bobbin tool friction stir welding of 6005A-T6 aluminum alloy

ZHANG Xinmeng; GAO Shikang; LI Gaohui; ZHANG Haifeng; ZHOU Li; WANG Ping

doi:10.12073/j.hjxb.20221119001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2023 > 44(9): 30-36. > DOI: 10.12073/j.hjxb.20221119001

ZHANG Xinmeng, GAO Shikang, LI Gaohui, ZHANG Haifeng, ZHOU Li, WANG Ping. Study on the fatigue performance of bobbin tool friction stir welding of 6005A-T6 aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(9): 30-36. DOI: 10.12073/j.hjxb.20221119001

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Study on the fatigue performance of bobbin tool friction stir welding of 6005A-T6 aluminum alloy

ZHANG Xinmeng^1,,
GAO Shikang^{2, 3},
LI Gaohui²,
ZHANG Haifeng³,
ZHOU Li^{2, 3, ,},
WANG Ping⁴

1.
CRRC Changchun Railway Vehicles Co. LTD, Changchun, 130062, China
2.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
3.
Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
4.
Harbin Institute of Technology at Weihai, Weihai, 264209, China

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Received Date: November 18, 2022
Available Online: June 24, 2023

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Abstract

Abstract

The fatigue tests of bobbin tool friction stir welding profile joints of 3.3 mm thick 6005A-T6 aluminum alloy with different dimensions were carried out to analyze the fatigue performance of the joints. Combined with the macroscopic forming and microstructure evolution of the joint under typical parameters, the fracture behavior of the bobbin tool friction stir welded joint was revealed. The results showed that the tensile fracture of the joint under typical parameters (rotation speed of 1 000 r/min, welding speed of 100 mm/min, width and thickness of parallel section of 11.8 mm and 3.1 mm) was located in the HAZ-RS. The grain structure characteristics in the TMAZ-AS of the joint could influence the fatigue cracks generation and propagation. The SEM analysis of fatigue fracture showed that no obvious defects were found. The fatigue cracks propagation and fracture zones showed typical fatigue fracture characteristics, and the fracture was located in the TMAZ-AS of the joint
- friction stir welding,
- 6005A-T6 aluminum alloy profile joint,
- fatigue crack growth

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References (25)

References

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Study on the fatigue performance of bobbin tool friction stir welding of 6005A-T6 aluminum alloy