Modelling of the thermal and microstructure fields during friction stir welding of aluminium alloys
- Frigaard O. ,
- Grong O. ,
- Bjorneklett B. ,
- et al
- Frigaard O. ,
- Grong O. ,
- Bjorneklett B. and
- Midling O.T.
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A process model for friction stir welding (FSW) of Al-Zn-Mg alloys, used to predict HAZ microstructure and hardness, is presented. Numerical solutions (using a finite difference approach) are developed for heat generation and heat flow. Microstructure modelling is performed (precipitate stability, kinetics of particle dissolution, response equations). Experimental verification of the process model is reported (HAZ thermal cycles, HAZ hardness distribution). Applications of the process model (problems, simulation results) are discussed. The outputs from the process model (temperature distribution, hardness distribution) and its aptness to alloy design and optimisation of welding conditions for age hardening aluminium alloys are illustrated.
1st International Symposium, 14-16 Jun 1999, Session 08: Modelling 2, Paper 01
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