A multi-scale micromechanical model for a Ni-based superalloy is presented. The unit cell on the material point level incorporates the two-phase ã/ã'-microstructure of the material and the role of the ã/ã'-interfaces in the mechanical behaviour is emphasized. A crystal plasticity framework is used to model the constitutive behaviour of the ã-matrixphase. The limited number of unit cell constituents and the micromechanical simplifications make the framework particularly efficient in a multi-scale approach. The model is implemented in a commercial finite element code and adequately simulates the material response for the alloy CMSX-4. The effect of microstructural changes on the mechanical response is demonstrated.
|Title of host publication||8th Conference on Materials for Advanced Power Engineering|
|Place of Publication||Belgium, Liege|
|Publication status||Published - 2006|