Thermodynamic theory of dislocation/grain boundary interaction

The thermodynamic theory of dislocation/grain boundary interaction, including dislocation pileup against, absorption by, and transfer through the grain boundary, is developed for non-uniform plastic deformations in polycrystals. The case study is carried out on the boundary conditions affecting work hardening of a bicrystal subjected to plane constrained shear for three types of grain boundaries: (i) impermeable hard grain boundary, (ii) grain boundary that allows dislocation transfer without absorption, and (iii) grain boundary that absorbs dislocations and allows them to pass later.

Automated summary

The thermodynamic theory of dislocation/grain boundary interaction is developed for non-uniform plastic deformations in polycrystals. A case study on the boundary conditions affecting work hardening of a bicrystal is conducted for three types of grain boundaries. The results show that different types of grain boundaries have different effects on work hardening.