Elastic Constants of Rhenium Single Crystals in the Temperature Range 4.2°–298°K

Abstract

The five independent elastic constants of single crystals of hexagonal close‐packed rhenium have been determined by the ultrasonic pulse‐echo technique over the temperature range 4.2°–298°K. The values at 298°K in units of 10¹¹ dyn/cm² are C₁₁=61.25, C₃₃=68.27, C₄₄=16.25, C₁₂=27.0, and C₁₃=20.6. The bulk modulus derived from these constants shows a temperature variation somewhat analogous to that which has been reported for other 4d–5d transition metals. The Debye temperature calculated from the elastic constants at 4.2°K is 416.2°K.