Abstract Scope |
Curvature is considered the common local driving force for grain boundary motion in all polycrystals. However, models and simulations derived from curvature-based motion cannot predict irregular, albeit commonly observed, grain growth behavior. This talk will highlight how 3D x-ray diffraction microscopy methods provide new insights for enabling microstructural design. 3D x-ray diffraction microscopy methods are non-destructive and map the full microstructure, providing an opportunity to observe grain growth in real 3D polycrystals. In this talk, experimental observations of growth in strontium titanate, alumina, and nickel will be compared to Monte Carlo Potts simulations to interrogate the role of curvature and grain boundary energy in microstructure evolution. Then, potential descriptors for abnormal grain growth, in which a few grains maintain a growth advantage, in recrystallized pure nickel will be evaluated. The outstanding challenges and opportunities for using 3D x-ray diffraction microscopy to elucidate microstructural evolution will be discussed. |