MICROMODELLING OF CREEP IN COMPOSITES WITH PERFECT MATRIX PARTICLE INTERFACES/

A new micromechanical model of creep in composites with perfect matrix /particle interfaces is suggested. The model assumes that particles ar e harder than the matrix and the plastic deformation in the matrix is due to time-dependent slip in discrete slip systems. Slip in the matri x causes the deposition of dislocations on the matrix/particle interfa ces hindering further slip. Creep in the composite is conditioned by d ynamic recovery due to the slip/climb motion of the dislocations along the matrix/particle interface to places where the dislocation loops d isappear. The mentioned processes are described by proper equations. T he equations are solved by finite element method (FEM) and a special F EM code is used for the micromodeling of creep in superalloy single cr ystals.