The deformation of a single crystal of aluminium in the Goss orientation
{011}⟨100⟩ containing a coarse particle of silicon was modelled by using a
finite-element (FE) code based on the crystal plasticity approach. The
simulations clearly captured the heterogeneous deformation of the aluminium
matrix, resulting in a region of high deformation in the vicinity of the hard
particle, surrounded by a region where the amount of deformation was
significantly lower. The evolution of the corresponding deformation
substructure during annealing was simulated using a Monte Carlo technique. The
simulations clearly demonstrated the discontinuous evolution of the subgrains
in the deformation zone to form recrystallization nuclei around the hard
particle, and the subsequent growth of these nuclei to consume the matrix
region around the particle. For plane strain compression up to εzz = -0.4 that was used
in this study, the deformation texture components near the particle consisted
of rotations up to 20° from the initial Goss orientation about the transverse
direction. Recrystallization simulations captured the formation and
growth of nuclei from the deformation heterogeneities existing near the hard
particle and predicted a significant strengthening of the orientations present
in the particle deformation zone. The simulation results are shown to capture
many of the experimentally observed features of deformation and
recrystallization textures in aluminium single crystals containing coarse
particles of silicon.
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