The microstructure in new alloys is increasingly being engineered toward specific properties. Welding, however, alters or destroys this carefully constructed microstructure in the weld and the surrounding region, known as the heat-affected zone (HAZ). Modeling the influence of the entire thermal cycle of the welding process with a physically based model for the material can provide new understanding of the microstructure evolution due to the welding process. In this work, the phase-field method employed uses a physically based model to describe the motion of grain boundaries during welding. Via a unique dual-mesh strategy, calculation times for a macroscopic HAZ are drastically reduced while still maintaining sufficient detail for microstructure characterization.

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