Texture studies of austenitic weld metal using elastic surface waves

Curtis, G.J.; Ibrahim, Nor Nurulhuda Md.

doi:10.1179/msc.1981.15.11-12.566

Cited by 7 publications

(1 citation statement)

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“…[9][10][11][12][13][14][15][16][17][18][19] Owing to their propagation characteristics, surface acoustic waves, especially when acoustic energy is incident onto the interface at some critical angles, 10 are very sensitive to discontinuities and changes of material properties at or near the surface and have been widely used for stress and texture measurement, [11][12][13][14][15] surface flaw ͑micro-cracks or inclusions͒ detection, 17,18 and interface characterization. 19 Surface wave techniques have many advantages compared to bulk wave measurements and can be used either to characterize structural materials directly or as an adjunct to bulk wave measurements.…”

Section: Introductionmentioning

confidence: 99%

Leaky Rayleigh wave scattering from elastic media with random microstructures

Zhang

Weaver

1996

The Journal of the Acoustical Society of America

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Scattering of leaky Rayleigh waves from a flat fluid-solid interface is studied. The fluid half-space is taken to be ideal and homogeneous while the solid half-space has randomly inhomogeneous anisotropic elastic constants due to the microstructure of the material. For plane waves incident from the fluid onto the interface at the critical Rayleigh angle the singly scattered incoherent field is obtained by utilizing a first Born approximation. When the solid is a crystal aggregate and when the correlation function is of exponential form, the mean-square scattered signal level is found to be inversely proportional to the dimensionless frequency in the geometrical ͑high-frequency͒ limit but proportional to the third power of frequency in the Rayleigh ͑low-frequency͒ limit. Numerical results are given for water-aluminum ͑cubic polycrystals͒ interface scattering.

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