Abstract
Considerable residual stress and distortion are inevitably produced by friction stir welding (FSW). An external stationary shoulder was applied to control and eliminate the residual stress and distortion of FSW joint. A thermo-mechanical model was utilized to analyze the effects of rotational velocities on temperature and stress distribution during welding. Results showed that the stationary shoulder provided synchronous rolling and intense cooling functions during welding, which reduced the peak residual tensile stress near the weld of FSW. The residual distortion of FSW joint was greatly reduced by the external stationary shoulder.
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Acknowledgements
This work was supported by “the National Natural Science Foundation of China (No.51705339), the Education Department Foundation of Liaoning Province (No. L201615) and the Science Foundation of State Key Laboratory of Robotics (No. 2016-007)”.
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He, W., Li, M., Song, Q. et al. Efficacy of External Stationary Shoulder for Controlling Residual Stress and Distortion in Friction Stir Welding. Trans Indian Inst Met 72, 1349–1359 (2019). https://doi.org/10.1007/s12666-019-01630-2
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DOI: https://doi.org/10.1007/s12666-019-01630-2