Dependence of the Elastic Properties of Cadmium on Temperature

Abstract

Yousef and Kamel¹ have studied Young's modulus and the internal friction of cadmium as a function of temperature at 50 cycles per second. Young's modulus vs. temperature curve of polycrystalline cadmium shows a sharp break at about 80° C., while the same metal in the single-crystal form behaves in a normal manner. This suggests that it may be due to stress relaxation at grain boundaries. One would then expect a higher transition temperature at higher frequencies. The same behaviour would also be expected in the case of the rigidity modulus. The variation of the elastic constants of polycrystalline cadmium with temperature at 100 kc./s. has therefore been studied.