Abstract
A new micromechanical model of creep in composites with perfect matrix/particle interfaces is suggested. The model assumes that particles are harder than the matrix and the plastic deformation in the matrix is due to time-dependent slip in discrete slip systems. Slip in the matrix causes the deposition of dislocations on the matrix/particle interfaces hindering further slip. Creep in the composite is conditioned by dynamic recovery due to the slip/climb motion of the dislocations along the matrix/particle interface to places where the dislocation loops disappear. The mentioned processes are described by proper equations. The equations are solved by finite element method (FEM) and a special FEM code is used for the micromodelling of creep in superalloy single crystals.

Key words
new micromechanical model, creep, composites, finite element method (FEM), superalloy single crystals

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