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Temperature Field Measurement and Analyses of Friction Stir Welding of 18mm Thick 2219 Aluminum Alloy

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Abstract

The fuel tank of the advanced heavy launch vehicle is made of 2219 aluminum alloy with a thickness of 18 mm. Friction stir welding (FSW) technology is used to achieve the welding of the fuel tank. The increase of thickness directly affects welding temperature field, which ultimately affects the welding quality. At present, the temperature distribution law of FSW thick 2219 aluminum alloy is still blank, which is a bottleneck to ensure high welding quality. In this paper, a temperature field measurement and analyses system based on K-type thermocouple and LabVIEW for friction stir welding is developed first. Then experiments are carried out and the temperature data in welding and thickness directions are measured and the temperature law is analyzed. The comparison of temperature distribution of FSW thick and thin 2219 aluminum alloy is made, and the influence of welding thickness on the temperature field is studied. Based on temperature field, weld strength and microstructure, the influence of different process parameters on welding quality is explored. The research results lay a foundation for optimization of the welding process parameters and realization of constant temperature control of FSW.

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Acknowledgements

The research was supported by the National Key Research and Development Program of China (Grant No. 2019YFA0709003), Dalian Science and Technology Innovation Fund (Grant No. 2020JJ26GX041) and the Fundamental Research Funds for the Central Universities (Grant No. DUT20ZD204). The financial contributions are gratefully acknowledged.

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Authors and Affiliations

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian, People’s Republic of China

    X. Lu

  2. Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, 116024, Dalian, People’s Republic of China

    X. Lu, Y. Zhou, Y. Luan & J. Qiao

  3. Capital Aerospace Machinery Company, Beijing, People’s Republic of China

    S. Sun

  4. Dalian University of Technology, 116024, Dalian, People’s Republic of China

    J. Qian

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  1. X. Lu
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  2. Y. Zhou
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  4. Y. Luan
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  5. J. Qiao
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Correspondence to X. Lu.

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Lu, X., Zhou, Y., Sun, S. et al. Temperature Field Measurement and Analyses of Friction Stir Welding of 18mm Thick 2219 Aluminum Alloy. Exp Tech 47, 579–590 (2023). https://doi.org/10.1007/s40799-022-00556-7

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  • DOI: https://doi.org/10.1007/s40799-022-00556-7

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