Tool Geometry for Friction Stir Welding—Optimum Shoulder Diameter

  title={Tool Geometry for Friction Stir Welding—Optimum Shoulder Diameter},
  author={M. Mehta and A. Arora and A. De and T. DebRoy},
  journal={Metallurgical and Materials Transactions A},
The most important geometric parameter in the friction stir welding (FSW) tool design is the shoulder diameter, which is currently estimated by trial and error. Here, we report a combined experimental and theoretical investigation on the influence of shoulder diameter on thermal cycles, peak temperatures, power requirements, and torque during FSW of AA7075-T6. An optimum tool shoulder diameter is identified using a three-dimensional, heat transfer and materials flow model. First, the predictive… Expand

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