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    Effects of materials positioning and tool rotational speed on metallurgical and mechanical properties of dissimilar modified friction stir clinching of AA5754-O and AA2024-T3 sheets

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    Publication date
    2021-03
    Author
    H. M., Lankarani,
    Memon, S.
    Paidar, M.
    Mehrez, S.
    Cooke, Kavian O.
    Ojo, O.O.
    Keyword
    Modified friction stir clinching
    Friction stir spot welding
    Aluminium alloys
    Material positioning
    Microstructure
    Mechanical properties
    Fracture
    Rights
    (c) 2021 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (https://creativecommons.org/licenses/by/4.0/)
    Peer-Reviewed
    Yes
    Open Access status
    openAccess
    
    Metadata
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    Abstract
    The performance of the modified friction stir clinched and friction stir spot welded joints of AA5754-O and AA2024-T3 Al alloy was improved by investigating the impact of material flow influencing parameters such as material positioning and tool rotational speed on the microstructure, mechanical and fracture behaviors of the joints. The results reveal that the positioning of a harder material (AA2024-T3) as the upper plate induces higher peak temperatures in the friction stir clinched (500 °C) and friction stir spot welded (475 °C) joints. This positioning favors inter-material mingling, grain coarsening with inherent higher dislocation density and tangles, and improved tensile failure loads in the AA2024-T3/AA5754-O joint than the AA5754-O/AA2024-T3 joint. The formation of partial weld-center defect declines in the AA2024-T3/AA5754-O at low tool rotational speed due to the better local heat build-up and geometric-differential flow effect in comparison with the AA5754-O/AA2024-T3 counterparts. The positioning of harder Al alloy on the top of a soft Al alloy is thus recommended for the improvement of modified friction stir clinched joints.
    URI
    http://hdl.handle.net/10454/18890
    Version
    Published version
    Citation
    Memon S, Paidar M, Mehrez S et al (2021) Effects of materials positioning and tool rotational speed on metallurgical and mechanical properties of dissimilar modified friction stir clinching of AA5754-O and AA2024-T3 sheets. Results in Physics. 22: 103962.
    Link to publisher’s version
    https://doi.org/10.1016/j.rinp.2021.103962
    Type
    Article
    Collections
    Engineering and Informatics Publications

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