Characterisation of consecutive friction stir overlap welds in thick 2124 aluminium plate for build-up of flanges for aerospace applications
- van Haver W. ,
- Guerten A. ,
- Defrancq J. ,
- et al
- van Haver W. ,
- Guerten A. ,
- Defrancq J. ,
- de Meester B. and
- Simar A.
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The microstructure, hardness, indentation profile, tensile strength, fracture cracking and grain boundaries of friction stir overlap welds in 2124 aerospace aluminium alloy were investigated. Welds were made in EN AW-2124 heat-treatable wrought AlCu4Mg1 alloy (Al, 3.8-4.9%Cu, 0.3-0.9%Mn, 1.2-1.8%Mg) T851 subjected to a T4 heat treatment followed by natural aging for one month. Flanges (30 mm height) were produced onto the plate by two consecutive overlap welds (the second carried out one week after the first), followed by a final milling, which achieved considerable cost savings compared with the conventional process. The effects of natural ageing, artificial ageing and solution heat treatment combined with artificial ageing on fracture mechanics properties of the welded flange were determined.
8th International Symposium, 18-20 May 2010, Session 8A: Non Ferrous, Paper 03
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