An investigation was made of the interaction between a dislocation and an energetically stable grain boundary, and its quantitative characteristics were determined via atomistic transition-state analysis. As a result, the interaction energy was found to be 0.116eV/Å; which was 104 times higher than the Peierls potential. The lattice dislocations subsequently experienced anomalous dissociation on the grain boundary, which became a key factor in the previously unexplained phenomena of dislocation disappearance and grain-boundary migration.

Fundamental Interaction Process between Pure Edge Dislocation and Energetically Stable Grain Boundary. T.Tsuru, Y.Shibutani, Y.Kaji: Physical Review B, 2009, 79[1], 012104