Modelling the relationship between process parameters, microstructural evolutions and mechanical behaviour in a friction stir welded 6xxx aluminium alloy
- Gallais C. ,
- Denquin A. ,
- Pic A. ,
- et al
- Gallais C. ,
- Denquin A. ,
- Pic A. ,
- Simar A. ,
- Pardoen T. and
- Brechet Y.
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Modelling tools were developed to describe the relationships between process parameters, microstructural evolution and mechanical properties of the weld in friction stir welding (FSW). Experiments were conducted using aluminium alloy 6056. Initial tempers were T4 (natural ageing after solution quenching) or T78 (overaged). Models were developed to describe heat generation, microstructural evolution, and tensile behaviour. The thermal model, based on torque during welding, allowed the determination of thermal cycles in zones in which thermal instrumentation is difficult. The microstructural model allowed the final microstructure to be predicted and showed that the minimum hardness corresponded to a maximum mean radius and an increased volume fraction of precipitates. The tensile behaviour of the weld could be modelled both locally and globally.
5th International Symposium, 14-16 Sep 2004, Session 8A: Modelling, Paper 01
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