Microstructural aspects and mechanical properties of friction stir welded AA2024-T3 aluminium alloy sheet |
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Authors: | Andreza S. Franchim Fernando F. Fernandez Dilermando N. Travessa |
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Affiliation: | 1. Embraer – Empresa Brasileira de Aeronáutica S.A: Av. Brigadeiro Faria Lima 2170, 12227-901 São José dos Campos, SP, Brazil;2. Departamento de Ciência e Tecnologia, Universidade Federal de São Paulo: R. Talim 330, 12231-280 São José dos Campos, SP, Brazil |
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Abstract: | In the present work, aluminium alloy AA2024-T3 thin sheets were joined by the Friction Stir Welding – FSW – process. Butt joints were obtained in 1.6 mm sheets, using an advancing speed of 700 mm/min. These joints were characterised by optical, scanning electron microscopy, tensile and fatigue mechanical tests. The results showed that the resulting microstructure is free of defects and the tensile strength of the welded joints is up to 98% of the base-metal strength. Fatigue tests result indicates an equivalent stress intensity factor (kt) of approximately 2.0 for the welded samples. Consequently, the FSW process can be advantageous compared to conventional riveting for airframe applications. |
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Keywords: | A. Non-ferrous metals and alloys D. Welding E. Mechanical |
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