Kinetic Theory of Dislocation Climb. I. General Models for Edge and Screw Dislocations

摘要: General kinetic models are established for the climb of edge and screw dislocations. The a straight unconstrained dislocation is considered in terms diffusion nonequilibrium point defects to (or from) line their absorption (emission) destruction (creation) at line. nucleated by formation short rows which attached extra plane bounded jog pairs. Climb occurs growth these aggregates until they destroy each other mutual collisions. No priori assumptions made about ability either or jogs maintain local defect equilibrium during climb, account taken rapid along core. Effects perturbing population also included. Equations describing this developed but left general form. Complete solutions worked out following paper (Part II). Complications arise when geometrical constraints curvature present discussed, description relationships between curvature, macroscopic tension, density given. It concluded that results model can be used many such cases over considerable range conditions. treatment focuses attention on an initially into multi‐turned helix. detailed mechanisms found depend strongly upon geometry mobility core, therefore only qualitative theory suggested crystals vacancies largely dissociate kinks enter helical turns build up rather uniformly aggregation ordered arrangements kinks.