Ultrasonic Measurements of Surface Roughness

  • G. V. Blessing
  • D. G. Eitzen
Conference paper

Summary

Ultrasonic reflectance/scattering measurements have been made on metal samples possessing a large range of surface roughness values. The root-mean-square roughnesses Rq ranged from 0.3 to nearly 40 μm on the mostly periodic surfaces. The echo amplitude from short incident pulses of ultrasound in the frequency range of 1 to 30 MHz was used, in the manner of a comparator, to measure relative roughnesses with an area-averaging approach defined by the ultrasonic beam spot size. Ultrasonic wavelengths ranged from about 50 to 300 μm at these frequencies, and the beam spot sized varied from 0.2 to 5 mm in diameter. Both air and fluid coupling techniques were used between the sensor (transducer) and surface, on both static and rapidly (in excess of 5 m/sec surface speed) moving parts. On static surfaces, a resolution of better than 1.0 μm Rq was achieved at the higher ultrasonic frequencies. By focusing the ultrasonic beam at 30 MHz, a profilometry capability was demonstrated on a 1 μm Rq sinusoidal specimen of 800 μm wavelength.

Keywords

Polyethylene Milling Convolution Remote Sensor 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    E.G. Thwaite, Prec. Eng. 6 (1984) 207–217.CrossRefGoogle Scholar
  2. 2.
    G.V. Blessing and D.G. Eitzen. U.S. Patent 4,738,139 (19 Apr 88).Google Scholar
  3. 3.
    D.G. Eitzen and G.V. Blessing, MRS Bulletin XIII Vol. 4 (1988) 49–52.Google Scholar
  4. 3.
    G.V. Blessing and D.G. Eitzen. U.S. Patent 4,738,139 (19 Apr 88).Google Scholar
  5. 4.
    A. Sataai-Jazi, C.K. Jen, G.W. Farnell, and J.D.N. Cheeke, J. Acoust. Soc. Am 81 (1987) 1273–1278.CrossRefGoogle Scholar
  6. 5.
    W.G. Neubauer, J. Acoust. Soc. Am. 35 (1963) 279–285.Google Scholar
  7. 6.
    N.F. Haines and D.B. Langston, J. Acoust. Soc. Am. 67 (1980) 1443–1454.CrossRefGoogle Scholar
  8. 7.
    J.Â. Ogilvy, J. Phys. D, Vol. 21 No. 2 (1988) 260–277.CrossRefGoogle Scholar
  9. 8.
    P. Beckmann and A. Spizzichino, The Scattering of Electromagnetic Waves from Rough Surfaces ( Pergamon, New York, 1963 ).Google Scholar
  10. 9.
    H.E. Bennett and J.O. Porteus, J. Opt. Soc. Am. 51 (1961) 123–129.CrossRefGoogle Scholar
  11. 10.
    M. deBilly, F. Cohen-Tenoudji, G. Quentin, K. Lewis, and L. Adler, Review of Progress in Quantitative NDE (July 1980) 320329.Google Scholar
  12. 11.
    G.V. Blessing, P.P. Bagley, and J.E. James, Matls. Eval. 42 (1984) 1’389–1400.Google Scholar
  13. 12.
    G.V. Blessing and D.G. Eitzen, Fourth International Conference on the Metrology and Properties of Engineering Surfaces Proceedings, 13–15 APR 88, Washington, D.C. (to be published: Kogan Page, London; and in Surface Topography, same publisher, 1989 ).Google Scholar
  14. 13.
    E.C. Teague, F.E. Scire, and T.V. Vorburger, Wear, 83 (1982) 61–73.CrossRefGoogle Scholar
  15. 14.
    T.V. Vorburger, Nat. Bur. Stand. (U.S.) (private communication of sample and data).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1989

Authors and Affiliations

  • G. V. Blessing
    • 1
  • D. G. Eitzen
    • 1
  1. 1.National Institute of Standards and TechnologyGaithersburgUSA

Personalised recommendations