Seiichi Nishikawa

Changes in properties of zinc plated aluminum wires after diffusion annealing at various temperatures

Electric and mechanical properties of wet galvanized aluminum wires of two different grades (99.999 and 99.85%) were investigated after diffusion annealing.Considerable differences were observed in electric conductivity and mechanical properties (such as 0.2% proof stress, maximum tensile strength, and ductilities in twisting and repeated bending test) between the wire of high purity grade with coarse grains and of commercial purity grade with fine grains. As the results of photomicrography and X-ray microanalysis, the reason for these differences were due to the behavior of boundary diffusion.