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Numerical Analysis of Effect of Backplate Diffusivity on the Transient Temperature in Friction Stir Welding

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Abstract

It is still not clearly known as to what extent the temperature field of friction stir welding joint is influenced by backplate diffusivity owing to the limitation of temperature measuring points. In the present study, therefore, the effect of backplate diffusivity on the temperature field of the workpiece was systematically investigated based on the numerical analysis. Simulated results show that the backplate diffusivity has a significant influence on not only the peak temperature but the final temperature distribution. More heat is dissipated by using a high thermal conductivity backplate during FSW. With increasing the backplate diffusivity, the peak temperature decreases gradually and the average cooling rate increases first and then slightly decreases. In addition, the time spent above 195 °C presents a nearly linear decrease with increasing the backplate diffusivity. Moreover, the width of temperature region higher than 195 °C in the transverse direction is remarkably diminished by using the backplate of a high conductivity, and changes little during the entire process.

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Acknowledgments

The authors would like to thank the National Natural Science Foundation of China (51005180, 51275338), the Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (131052), the Research Fund of the State Key Laboratory of Solidification Processing (NPU, China) (69-QP-2011), the Fundamental Research Fund of NPU (JC201233) and the 111 Project (B08040) for their financial supports.

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi’an, 710072, Shaanxi, People’s Republic of China

    Zhihan Zhang, Wenya Li & Jinglong Li

  2. College of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China

    Y. J. Chao

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  1. Zhihan Zhang
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  2. Wenya Li
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  3. Jinglong Li
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  4. Y. J. Chao
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Correspondence to Wenya Li.

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Zhang, Z., Li, W., Li, J. et al. Numerical Analysis of Effect of Backplate Diffusivity on the Transient Temperature in Friction Stir Welding. J. of Materi Eng and Perform 22, 2446–2450 (2013). https://doi.org/10.1007/s11665-013-0538-7

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  • DOI: https://doi.org/10.1007/s11665-013-0538-7

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