FSW double and cross welding in aluminium alloys were carried out to analyze the ability of the process in manufacturing aircraft wings. The principal materials used for manufacturing aircraft wings are 2024 T-351 aluminium alloy (fuselage) and 7075 T-351 aluminium alloy (wing structure). The welds were analysed through thermal cycles and micro-hardness and tensile tests, and were also subjected to microstructural analysis under an optical microscope and with scanning electron microscopy. With FSW double welding in Al 20234 T-351 aluminium alloy in butt joints, the side of the weld that reaches the higher temperature is the leading edge, but despite this the tensile resistance remains practically equal to that of a single weld, and it does not compromise the final quality of the welds. The FSW cross welds in 2024 T-351 (upper) and 7075 T-351 (lower) aluminium alloy in double welds, produce a microstructure which is more refined in the area of the cross, with good nugget geometry, without defects in the root, all of which results in high quality welds from a microstructural point of view.
Double and cross friction stir welding - FSW
Welding International ; 21 , 2 ; 130-136
2007
7 Seiten, 14 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
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