Abstract
We discuss phase field simulations of the microstructure evolution in an Ag–Cu brazing filler for conditions close to reactive air brazing (RAB) under air. The simulations show the basic steps of the phase formation in the brazing filler during solidification and provide calculated DSC curves, which allow a direct comparison between simulation and experiment. It is demonstrated that the consideration of transport processes (mainly oxygen) is necessary for a quantitative interpretation of measured differential scanning calorimetry (DSC) curves. Furthermore, simulations demonstrate the effect of different Cu‐contents on the microstructure and the corresponding DSC curves. Finally, the effective temperature‐dependent thermal expansion including the eigenstrain from the phase transformation is calculated for the two‐phase microstructure.
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