抄録
In recent years, lighter materials are prone to be demanded particularly in the field of transportation as a solution of global environment problems. Because aluminum has a relatively small density and high electric conductivity, 30% and 60% of those of copper, respectively, replacing wiring cable materials from copper to aluminum cause weight saving at the same electric conductivity level. However, the strength of aluminum must be improved by alloying etc. keeping its high electric conductivity when applied to the actual wire cables.Specimens of aluminum with 99.99mass% purity and with Cu up to 1.0mass% were induction-melted, continuously cast into a round bar of 8mm in diameter and then cold-drawn. Tensile test and assessment of the electric conductivity were carried out. As a result, 0.2% proof stress and ultimate tensile strength were increased while elongation and the electric conductivity were decreased, as the addition amount increased. Despite the decrease in the elongation, ductile fracture was observed irrespective of addition amount.
