Elastic constants of Ti–40 at.% Nb at 298 °K

Abstract
The single-crystal elastic constants of a commercial superconducting alloy Ti–40 at.% Nb have been measured at 298 °K. The results are C11=156.5±0.4 GPa, C12=111.6±0.4 GPa, C44=39.63±0.08 GPa, and C′=22.47±0.04 GPa. The value of C′ predicted by an empirical expression involving the effective electron-to-atom ratio, e*/a is 16% smaller than the measured value. The β-alloy was found to be stable to 78 °K.