Orientation Stability In Equal-channel Angular Extrusion Of Body-centered Cubic Materials By {110}<111> And {112} <111> Slip

摘要

Orientation stability in equal-channel angular extrusion of body-centered cubic (bcc) materials is analyzed according to lattice rotation field simulated by a rate-dependent crystal plasticity model, assuming {110} <111> and {112} <111> slip. The results show that the experimentally observed ideal orientations along the {110}(uvw)_θ and {hkl} <111>_θ fibers are relatively stable under either of the deformation mechanisms. The change of slip planes from {110} to {112} leads to decreased stabilities of the {110)(uvw)_θ orientations and an increased stability of the D_(2θ) orientation (along the {hkl} (111)_θ fibers), which are consistent with previous texture simulations for polycrystalline bcc materials.