Temperature Dependence of the Elastic Constants of Molybdenum

Abstract

The elastic properties of molybdenum single crystals have been measured using thin-rod resonance techniques as a function of temperature from −198° to over +650°C. Molybdenum behaves in a normal manner over this temperature range. Its elastic stiffness coefficients, with the exception of C12 which increased 3%, decreased in a nearly linear manner. The decrease was 8% for C44, 11% for C11, and 18% for C′. From these data the temperature dependence of the bulk modulus, the shear coefficient C′, the anisotropy ratio, and the Young's and shear modulus of isotropic polycrystalline molybdenum were calculated.