Characterization of the interface roughness of coatings based on ultrasonic reflection coefficient amplitude spectrum

Zhiyuan Ma, Wei Zhang, Jianying Gao, Li Lin*, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In order to nondestructively characterize the interface roughness of coatings effectively, the ultrasonic reflection coefficient amplitude spectrum (URCAS) involving interface roughness was derived based on the phase-screen approximation theory. The interface roughness was determined by a two-parameter inversion combined with a cross-correlation algorithm. For homogeneous coatings, the effects of ultrasonic wavelength λ, beam coverage, and shape variations of the coating on the roughness measurements were analyzed through numerical calculation. A series of simulations indicated that measurement errors were less than 10% when the relationship between interface roughness and wavelength satisfied Rq=1.5%λ∼11%λ approximately. Ultrasonic experiments were carried out on standard roughness specimens utilizing water immersion, flat transducers. The roughness Rq of the standard roughness specimens were 8.5 μm, 14.2 μm, and 28.6 μm measured by confocal laser scanning microscope (CLSM), respectively. Experimental results show that the roughness of standard roughness specimens obtained by the proposed ultrasonic measurement are in good agreement with the CLSM observations, and the relative errors are less than 8.5%.

Original languageEnglish (US)
Title of host publication43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36
EditorsLeonard J. Bond, Dale E. Chimenti
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414747
DOIs
StatePublished - Feb 16 2017
Event43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2016 - Atlanta, United States
Duration: Jul 17 2016Jul 22 2016

Publication series

NameAIP Conference Proceedings
Volume1806
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2016
CountryUnited States
CityAtlanta
Period7/17/167/22/16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ma, Z., Zhang, W., Gao, J., Lin, L., & Krishnaswamy, S. (2017). Characterization of the interface roughness of coatings based on ultrasonic reflection coefficient amplitude spectrum. In L. J. Bond, & D. E. Chimenti (Eds.), 43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36 [090021] (AIP Conference Proceedings; Vol. 1806). American Institute of Physics Inc.. https://doi.org/10.1063/1.4974665