Abstract
Numerical modelling of a temperature-controlled laser joining process of aluminum to galvanized steel is presented. First, the temporal evolution of the interface temperature is calculated by the use of an integrated virtual proportional-integral-derivative (PID) controller. The obtained interface temperature is then used to predict the thickness of the intermetallic layer by solving Fick’s second law assuming one-dimensional diffusion and considering the temperature dependence of the diffusion coefficient. The results show good agreement with experimentally obtained values of the thickness of the intermetallic layer.
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