| 摘要 |
A fracture resistant friction stir welding tool includes a pin for plunging into one or more workpiece(s) to be welded and a shoulder for preventing plasticized material from flowing out of the joint being welded. The friction stir welding tool includes a tool body including a cavity for receiving the shoulder and exerting a compressive stress on the shoulder, and the pin is placed in compression by an axial tension member in the pin.
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