Optimum Processing and Tool Controls for Three-Dimensional Friction Stir Welding

Hironori Takahara; Masato Tsujikawa; Sung-Wook Chung; Yuzo Okawa; Sachio Oki; Kenji Higashi

doi:10.2320/matertrans.L-MRP2008816

Hironori Takahara, Masato Tsujikawa, Sung-Wook Chung, Yuzo Okawa, Sachio Oki, Kenji Higashi

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Keywords: friction stir welding, three-dimensional welding, aluminum alloy, microstructure, mechanical properties

JOURNAL FREE ACCESS

2008 Volume 49 Issue 8 Pages 1911-1914

DOI https://doi.org/10.2320/matertrans.L-MRP2008816

View "Advance Publication" version (July 9, 2008).

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Abstract

The influence of three-dimensional friction stir welding tool-control on joints’ mechanical properties was investigated. Although FSW is widely applied to linear joints, it is impossible for five-axes FSW machines to maintain all FSW parameters in optimum conditions during three-dimensional (3D) welding. Such 3D FSW joints should be produced according to an order of priority for FSW parameters. Butt joints with rectangular change in the welding direction on a curved plane (curved L butt joints) were welded using different three tool-control methods, which change various welding parameters. Results show that the A and C axes shortcut method is effective for 3D welding.

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