Polish-induced surface damage in nickel: Scanning acoustic microscopy and Brillouin scattering study

Abstract
The angular dispersion of surface acoustic wave velocities on {100} planes of a nickel single crystal has been measured using continuous wave scanning acoustic microscope and Brillouin scattering. This dispersion is used to calculate the elastic constants. They are compared with bulk ultrasonic measurements performed on the same sample. Systematic differences have been observed in elastic constants and anisotropy. These are attributed to surface damage due to mechanical polishing of the specimen.