Influence of external constraint on deformation behaviour of copper single crystals with {112}〈111〉 orientation

The effect of external constraint on the deformation behaviors of {112}〈111〉 oriented crystals have been studied by deforming assemblies of copper single crystals embedded in metal frames of different strength. when external constraint is weak, the crystals would undergo a more homogeneous deformation with a larger macroscopic shear strain. When the external constraint is large, the crystal would deform with an average strain closer to that imposed macroscopically. In the case of the {112}〈111〉 crystal, the inhomogeneity is mainly in a form of shear banding. The shear banding relax the shear strain in the matrix of the {112}〈111〉 crystal such that the {112}〈111〉 orientation was stabilized.