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Dissimilar FSW of AA2024 and AA7075: effect of materials positioning and tool deviation value on microstructure, global and local mechanical behavior

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Abstract

In this work, the effect of material location and tool deviation on global and local mechanical behavior of dissimilar AA2024/AA7075 friction stir weld joints was investigated. The results showed that increasing the tool deviation value up to 1 mm towards the soft material, fixed in the advancing side, improved the material mixing quality and enhanced the grain refinement in the stir zone. It was found that the highest ultimate tensile strength was obtained when the AA7075 alloy was fixed in the retreating side for 1-mm tool deviation towards the AA2024 alloy. Above this deviation value, a gradual decrease of the global mechanical properties of the weld joints was noticed. The digital image correlation (DIC) technique coupled to tensile testing revealed an improvement of local strain in the stir zone as well as the heat-affected zones of the dissimilar joints when the AA2024 alloy was positioned in the advancing side.

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Authors and Affiliations

  1. Laboratoire de Fiabilité Des Équipements Pétroliers Et Matériaux (LFEPM), Faculté des Hydrocarbures et de la Chimie, Université M’Hamed Bougara, Boumerdès, Algeria

    Idir Hadji & Mohamed Gaceb

  2. Research Center in Industrial Technologies CRTI, P.O. Box 64, 16014, Cheraga, Algiers, Algeria

    Idir Hadji, Riad Badji & Billel Cheniti

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  1. Idir Hadji
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Correspondence to Idir Hadji.

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Hadji, I., Badji, R., Gaceb, M. et al. Dissimilar FSW of AA2024 and AA7075: effect of materials positioning and tool deviation value on microstructure, global and local mechanical behavior. Int J Adv Manuf Technol 118, 2391–2403 (2022). https://doi.org/10.1007/s00170-021-08120-0

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