Laser-Ultrasonic Characterization of Electrodeposited Chromium Coatings Knight, Bryon Braunstein, Jeffrey Cox, Joseph Frankel, Julius 2018-02-14T08:49:07.000 2020-06-30T06:51:58Z 2020-06-30T06:51:58Z Fri Jan 01 00:00:00 UTC 1999 1999
dc.description.abstract <p>Metal coatings are of interest in applications where erosion, corrosion, or mechanical degradation result from chemical, temperature and mechanical insults to the surface. The evaluation of a coating nondestructively, responds to the need to estimate its effectiveness prior to actual use, without damaging it. An area of interest is the coatings’ elastic properties. These properties are determined here by measuring bulk and Rayleigh ultrasonic velocities. The material bulk velocities are found by measuring the thickness and shear and longitudinal ultrasonic time-of-flight of the substrate with and without the electroplated chromium coating. Elastic properties of the material are calculated from the bulk velocities measured assuming little or no dispersion within the material. The Rayleigh (surface wave) velocity is measured using a pulsed laser for ultrasonic wave generation in conjunction with a Michelson interferometer for signal detection. Wavelet analysis is used as a signal processing technique to determine the dispersion curves for the laser generated surface acoustic waves. The specimens are produced by electrodepositing chromium of various thicknesses on 2 in. × 1 in. × 0.5 in. steel coupons using controlled plating parameters.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 3908
dc.identifier.contextkey 5820145
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1999/allcontent/45
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.uri 10.1007/978-1-4615-4791-4_45
dc.title Laser-Ultrasonic Characterization of Electrodeposited Chromium Coatings
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3