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- W2935843148 startingPage "8756" @default.
- W2935843148 abstract "Grain boundary (GB) migration in polycrystalline materials necessarily implies the concurrent motion of triple junctions (TJs), the lines along which three GBs meet. Today, we understand that GB migration occurs through the motion of disconnections in the GB plane (line defects with both step and dislocation character). We present evidence from molecular dynamics grain growth simulations and idealized microstructures that demonstrates that TJ motion and GB migration are coupled through disconnection dynamics. Based on these results, we develop a theory of coupled GB/TJ migration and use it to develop a physically based, disconnection mechanism-specific continuum model of microstructure evolution. The continuum approach provides a means of reducing the complexity of the discrete disconnection picture to extract the features of disconnection dynamics that are important for microstructure evolution. We implement this model in a numerical, continuum simulation and demonstrate that it is capable of reproducing the molecular dynamics (MD) simulation results." @default.
- W2935843148 created "2019-04-25" @default.
- W2935843148 creator A5011240598 @default.
- W2935843148 creator A5016382121 @default.
- W2935843148 creator A5022915033 @default.
- W2935843148 creator A5029127277 @default.
- W2935843148 creator A5035464114 @default.
- W2935843148 date "2019-04-15" @default.
- W2935843148 modified "2023-10-16" @default.
- W2935843148 title "Disconnection description of triple-junction motion" @default.
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