Repair of defective FSW butt joints
- Biallas G. ,
- Ostersehlte H. and
- Dressler U.
- Biallas G. ,
- Ostersehlte H. and
- Dressler U.
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The use of a full-length welding process to repair defective friction stir welded (FSW) butt joints in aerospace aluminium alloys was evaluated. Lack of penetration, offset and tunnel defects were investigated in AA6156-T6, AA2198-T8 and AA2024-T3 alloys (3.2 mm thickness) using high-frequency ultrasonics and electrical conductivity measurements. Joints were re-welded over the full length using Airbus standard parameters. One or two repair cycles were carried out. Microstructure, bending, fatigue and tensile strength were also determined. The higher sensitivity of the artificially aged tempers of 2198-T8 and 6156-T6 towards additional thermal cycles is discussed.
8th International Symposium, 18-20 May 2010, Session 7B: Aluminium and Repair, Paper 03
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