The Influence of Plastic Deformation and Chewmical Environment on the Resistivity of Al-Alloy Overhead Lines

Abstract

The electrical resistivity and intensity of X-ray diffraction reflexes were determined for overhead line wires deformed plastically and immersed at different solutions. Immersing (chemical ageing) was performed by plastic deformation along the wire axis. During chemical ageing the samples were exposed to the action of the Cl^-, SO₄^2-, and SO₃^2- ions. Resistivity was measured at room temperature and at liquid nitrogen temperature. After the X-ray and resistivity measurement data were compared, it was found that three processes could take place: the flow of ions through the boundary between a sample and environment; the mechanical relaxation of vacancies near a line of dislocations, and the ordering of microstructure. These effects can lead to the anisotropy of resistivity.