By using in situ tensile straining, in conjunction with stereo imaging in a transmission electron microscope, real-time observations were made - in thin foils - of the interaction of glide dislocations with a dislocation node. A mechanism was observed via which a dislocation which approached the node effectively by-passed it by exchanging segments with one of the dislocations that constituted the node.

Transmission Electron Microscopy Study of the Interaction between a Glide Dislocation and a Dislocation Node. R.J.McCabe, A.Misra, T.E.Mitchell: Philosophical Magazine, 2003, 83[36], 4123-9