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The phase field model of dislocations has been used to study the propagation of dislocation ribbons with an overall Burgers vector of a〈112〉 through a simulated Ni-base superalloy. The driving force for dislocation dissociation reactions and formation of planar faults is incorporated into the free energy functional using periodic functions specially fitted to ab initio γ-surface data. The model shows...
Phase field method has become an attractive alternative to study dislocations of arbitrary configurations. Recently the model has been generalized for dislocation nodal reactions and network formation. Within the same framework, we study dissociation of various dislocation configurations into Shockley partials by incorporating directly γ-surface data from ab initio calculations into the crystalline...
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