Analytical bonding criteria for joint integrity prediction in friction stir welding of aluminum alloys |
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Authors: | Gianluca Buffa Sergio Pellegrino Livan Fratini |
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Affiliation: | Department of Chemical, Management, Computer Science and Mechanical Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy |
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Abstract: | In this study, two bonding criteria, previously used for porthole die extrusion, are applied to FSW starting from the local value of the main field variables calculated through a specifically developed 3D numerical model of the process. Their applicability and effectiveness have been assessed through an experimental and numerical campaign carried out with the main process parameters varying in a wide range. The pressure–time–flow criterion was demonstrated to be better suited for FSW processes when large welding speed is used. |
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Keywords: | Friction stir welding Aluminum alloys FEM Bonding criterion |
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