Measurement of texture in steel by laser-ultrasonic surface waves

A laser-ultrasonic approach based on the propagation of surface skimming longitudinal wave (P-wave) and Rayleigh wave (SAW) is investigated for the measurement of texture in moderately thick steel plates. The angular dependence of the P-wave and SAW velocities presents different patterns, both of am...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 278; no. 1; pp. 012007 - 4
Main Authors Lévesque, D, Lim, C S, Padioleau, C, Blouin, A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 2011
Subjects
Angular velocity
Longitudinal waves
P waves
Physics
Plates
Rayleigh waves
Residual stress
Steel plates
Steels
Surface layer
Surface layers
Surface waves
Texture
Wave propagation
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Summary:A laser-ultrasonic approach based on the propagation of surface skimming longitudinal wave (P-wave) and Rayleigh wave (SAW) is investigated for the measurement of texture in moderately thick steel plates. The angular dependence of the P-wave and SAW velocities presents different patterns, both of amplitude of a few % attributed to texture. Moreover, the difference of the P-wave and SAW profiles is shown to be very robust against small path length changes or other detrimental effects. For measurements on large plates, a solution based on the rotation of a generation line using an axicon lens is tested. Texture variations across the width of steel plates and the influence of residual stress are discussed.
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/278/1/012007