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Efficacy of External Stationary Shoulder for Controlling Residual Stress and Distortion in Friction Stir Welding

  • Weiliang He
  • Mingshen Li
  • Qi SongEmail author
  • Jinglin Liu
  • Wei Hu
Technical Paper
  • 20 Downloads

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.

Keywords

Friction stir welding Stationary shoulder 2024-T4 aluminum alloy Residual stress Synchronous rolling Distortion 

Notes

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)”.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  1. 1.School of Aerospace EngineeringShenyang Aerospace UniversityShenyangPeople’s Republic of China

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