Measurement of elastic constants of polycrystals by the resonance method in a cylindrical specimen (Elastic anisotropy of an axisymmetrical specimen)

Abstract

By use of the resonance method in a cylindrical specimen, anisotropic elastic constants of an axisymmetrical specimen have been measured. Two Young's moduli, Ez, Er=Eθ, two shear moduli, C44, C66, and Poisson's ratio νzr are determined in a JIS-C 3604 brass (60/40) specimen which is mono-axially deformed in compression up to 49% of nominal strains. The elastic anisotropy factors, Ez/Er=1.08 and C66/C44=1.11, are obtained in this specimen. Finally, isochronal recovery experiments have been performed in the deformed specimen, so that these elastic anisotropies in Young's moduli and shear moduli are almost removed by the annealing up to 450°C.