Modelling the deformation of face centred cubic crystals to study the effect of slip on {110} planes

The deformations of single crystals and polycrystals of aluminium have been modelled using the finite-element method. The constitutive behaviour is mo delled using crystal plasticity to account for the plastic deformation by s lip, and to track the hardening and reorientation of the material. By discr etizing each crystal with a large number of elements, the nonuniform deform ations due to local inhomogeneities and interactions with neighbouring crys tals are modelled. Simulations of plane strain compression of (001)[110] or iented single crystals are used to demonstrate the ability of the model to capture shearing in the rolling-normal plane, and the consequent reorientat ion of the crystal to the {112}(111) copper components. The simulations are used to examine the effect of including {110}(110) slip systems in additio n to the usual {111}(110) systems for face centred cubic metals on the stab ility of the cubic orientation. The results indicate that slip on {110} pla nes greatly enhances the stability of the cubic orientation while having li ttle contribution in the deformation of most other orientations.