NUMERICAL-SIMULATION OF DIFFUSIVE INTERACTION OF PRECIPITATES WITH MATRIX IN MULTICOMPONENT SYSTEMS

The proposed method of numerical simulation of diffusive interaction b etween precipitates and matrix is based on the application of the Fini te difference method and on the solution of differential equations of diffusion as well as of the equations of mass balance in differential form in combination with transcendental thermodynamic equations descri bing the conditions of local equilibrium at interfaces. This method wa s used to calculate the dissolution of vanadium carbides in austenite and to consider the dependence of the kinetics of the carbide dissolut ion on the overlapping of the diffusion fields of different precipitat es for carbon and carbide-forming element.