Abstract
In order to investigate how the Elinvar characteristics of nickel at high temperature are altered by the addition of aluminum and tantalum as a second element, measurements of Young’s moduli at low and high temperatures and thermal expansion at room temperature were made for the binary alloy systems. In either of Ni–Al or the Ni–Ta alloys, the Elinvar characteristics of nickel at high temperature were attenuated with the addition of these elements; Young’s moduli were depressed along the magnetic transformation points. Also, a small minimum of the linear coefficient of thermal expansion was observed to appear near the composition range where the Elinvar characteristics occurred at room temperature.
