Dislocation dragging by electrons in metals

A predictive analytical friction model from basic theories of interfaces, contacts and dislocations

“…It has been shown both theoretically [39] and experimentally [34,[36][37][38] that the plastic properties, namely dislocation drag, are greatly affected by crossing the superconducting transition. Detailed mathematical expressions for the form of drag can be found in works by Kaganov and Natsik [63] and Huffman and Louat [39]. Interestingly, for the case of dry friction, these calculations demonstrate that for v < <v c the electron drag coefficient B e is no longer constant under the superconducting transition temperature.…”

Real-space first-principles electronic structure of edge dislocations: NiAl

“…First, there are those that show a dependence of the electrical resistivity and other kinetic properties on plastic deformations (Gantmakher and Kulesko 1975, Brown 1977a, Bross and Ha È berlen 1993. Another fascinating example is the observation of changes in mechanical properties accompanying a superconducting phase transition in metals (Kaganov et al 1973). An additional set of experimental data giving information (although not directly) on electron± dislocation interactions is on solid-solution hardening in metals and especially in intermetallics (see the discussion given by Anokhin et al (1996) and references therein).…”

Study of the mechanisms of current-induced suppression of serrated deformation

“…where is the electron concentration; is the elementary charge; and is the constant of electron-dislocation interaction, which is assumed to be comparable with the electron component of the viscous friction of dislocations [45]. Assuming that = 0.286 nm, = 6.25 × 10 22 cm -3 , and dyn s/cm 2 at 300 K for aluminum [46,47], we obtain MPa/(A/cm 2 ).…”