High-temperature elastic properties of a nickel-based superalloy studied by surface Brillouin scattering

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/57803

Title: High-temperature elastic properties of a nickel-based superalloy studied by surface Brillouin scattering
Author(s): Zhang, X.; Stoddart, P. R.; Comins, J. D.; Every, Arthur G.
Abstract: Surface Brillouin scattering (SBS) has been used to study the thermally induced surface vibrations (phonons) and thereby obtain the elastic properties of the nickel-based superalloy CMSX-4. SBS spectra have been acquired for a range of wavevector directions in the (001) surface in the single-crystal specimen to determine the angular variation of SAWvelocities and the nature of the various excitations. Rayleigh and pseudo-surface acoustic waves as well as the details of the Lamb shoulder are studied, and the elastic constants and engineering moduli are determined using different, but self-consistent, methods at ambient and high temperatures. Calculations of the SBS spectra using surface Green function methods are in good agreement with the experimental results.
Publication type: Journal article
Source: Journal of Physics: Condensed Matter, Vol. 13, no. 10 (Mar 2001), pp. 2281-2294
Publication year: 2001
FOR Code(s): 0204 Condensed Matter Physics; 0206 Quantum Physics
Keyword(s): Nickel-based superalloy; Photons; SBS; Spectra; Surface Brillouin scattering; Thermally induced surface vibrations
Publisher: Institute of Physics Publishing
ISSN: 0953-8984
Publisher URL: http://dx.doi.org/10.1088/0953-8984/13/10/320
Peer reviewed