Finite element (FEM) techniques for the continuum modelling of thermomechanical processing are well established. This paper describes the coupling of FEM with a microstructural model for the evaluation of particle stress during forging of a metal matrix composite (MMC). High materials cost mean that a good understanding of the effect of the processing route on microstructure is vital. To this end an Eshelby type approach is used to predict particle stress evolution as a response to local variation in stresses, strains, strain-rates and temperatures. These variations are provided both historically and spatially by FEM. It is envisaged that this method will lead to a better understanding of 'damage' modes (particle cracking/debonding etc.) observed at the microscale in MMCs. Preliminary comparisons between optical micrographs of damage in forged MMC components and particle stress maps are presented.
|Number of pages||7|
|Journal||Journal of Materials Processing Technology|
|Publication status||Published - 15 Jun 1996|
- Damage modelling
- Finite element
- Metal matrix composites
- Particle stress