Understanding and predicting the microstructural changes that occur during and following corrosion is critical for designing materials with improved durability and performance across a range of engineering applications. Phase-field modeling has emerged as a powerful computational approach for simulating the complex morphological and compositional evolution that materials undergo in corrosive environments. In this talk, I will describe phase-field modeling of microstructural evolution of magnesium and its alloys in aqueous environment, as well as a nickel-chromium alloy in molten salt environment. These models incorporate key phenomena, including bulk and interfacial thermodynamics, multi-phase/polycrystalline microstructures, and diffusion and reaction kinetics. Selected simulation results will demonstrate the ability of phase-field models to bridge length scales from nanoscale phenomena leading to corrosion to formation to microstructure evolution that are responsible for material degradation. The insights gained from phase-field simulations provide valuable guidance for interpreting experimental observations. The integration of phase-field methods with three-dimensional experimental data will be discussed as a promising path toward predictive, mechanistic understanding of corrosion processes.
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