Abstract
Influence of non-uniform deformation on lattice strain development in bicrystals was numerically investigated by a crystal plasticity finite element method. Focusing on interactions through the grain boundaries owing to plastic incompatibility, the numerical analysis of tensile loading of a bicrystal and constituent single crystals were performed. The numerical result of the bicrystal model indicated non-linear lattice strain development whereas the constituent single crystal models showed nearly linear development of lattice strain. To evaluate the influence of orientation relationship between grains in each bicrystal on lattice strain development, calculations of tensile loading of bicrystals with different crystal orientations were also analyzed. The results exhibited significant influence of the orientation relationship on lattice strain development. Finally, mechanism of lattice strain development was discussed in terms of active deformation modes and lattice rotation.
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