Modelling and Visualisation of Material Flow in Friction Stir Spot Welding
Journal of Materials Processing Technology
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Reilly, A., Shercliff, H., Chen, Y., & Prangnell, P. (2015). Modelling and Visualisation of Material Flow in Friction Stir Spot Welding. Journal of Materials Processing Technology, 225 473-484. https://doi.org/10.1016/j.jmatprotec.2015.06.021
The material flow in friction stir spot welding of aluminium to both aluminium and steel has been investigated, using pinless tools in a lap joint geometry. The flow behaviour was revealed experimentally using dissimilar Al alloys of similar strength. The effect on the material flow of tool surface features, welding conditions (rotation speed, plunge depth, dwell time), and the surface state of the steel sheet (un-coated or galvanized) have been systematically studied. A novel kinematic flow model is presented, which successfully predicts the observed layering of the dissimilar Al alloys under a range of conditions. The model and the experimental observations provide a consistent interpretation of the stick-slip conditions at the tool-workpiece interface, addressing an elusive and long-standing issue in the modelling of heat generation in friction stir processing.
Friction stir spot welding, Dissimilar materials, Aluminium alloys, Galvanised steel, Automotive alloys, Process modelling
The authors wish to thank the EPSRC for funding this research through the following grants: Friction Joining – Low Energy Manufacturing for Hybrid Structures in Fuel Efficient Transport Applications (EP/G022402/1 and EP/G022674/1); and LATEST2, Light Alloys Towards Environmentally Sustainable Transport (EP/H020047/1).
External DOI: https://doi.org/10.1016/j.jmatprotec.2015.06.021
This record's URL: https://www.repository.cam.ac.uk/handle/1810/248935
Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by-nc-nd/2.0/uk/
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