Cyclic-bending deformation of aluminum rectangular wire with preferred orientation 〈111〉 parallel to drawing direction

Abstract

The effects of crystal lattice rotation and crystal orientation were analyzed in cyclic bending for aluminum wire. Typical result was improvement of cyclic bending properties in aluminum wire suggested that grain refining and DD//〈111〉 preferred orientation were effective. Grain refinement is indicated to suppress crystal lattice rotation near the grain boundaries in cyclic bending deformation and increase the number of cyclic bending fractures. The feature of intergranular crack formation in cyclic bending deformation is that there is Burgers vector of the primary slip system’s that is perpendicular to the grain boundaries inclined 45° with the primary stress axis and parallel to the ND plane. These are not present in DD//〈111〉 grains, but are present in DD//〈001〉 grains. These facts are speculated that DD//〈111〉 crystal grains delay the formation of intergranular cracks, the number of cyclic bending fracture depends on texture.These results give design and manufacturing guidelines for aluminum wire conductors for automotive wire harness with excellent cyclic bending properties by DD//〈111〉 preferential orientation of aluminum wire.