Multiscale Modeling of the Effect of Strain Reversal on the Deformation Behavior of FCC Structure Using Combined 3D Digital Materials Representation and Crystal Plasticity Approach

摘要

Multiscale finite element model utilizing 3D Digital Materials Representation (DMR) approach [1] is combined with Crystal Plasticity (CP) and used to study the effect of strain reversal on the hot deformation process of austenite phase. Cyclic torsion test is used to simulate hot plate rolling process - especially the area near the stock surface - and to predict the level of redundant strain and strain inhomogeneity in the austenite. It is well known that hot rolling process is characterized by microstructural inhomogeneity across the stock thickness due to the change in strain state. This complex strain path introduces microstructural inhomogeneity and makes its predictions difficult. In the presented work the CP code is incorporated into the 3D DMR model what enables material to be modeled both at micro and macro scales taking into consideration texture effects. As a results effect of strain path change during hot deformation of austenite can be modeled.