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Determination of Surface Finish Quality of Metals By Means of Optical Methods

Ariono Abdulkadir & Richard C. Birkebak



Determination of surface - finish quality is done by measurements of its rms. Values of surface roughness and slopes. Mechanical measurements of these properties are done by using a profilometer. This method, however, is limited to surface having asperities larger then the size of the profilometerís tip and is of destructive type of testing. Alternate techniques using optical method based on the theories of Davies and Beckmann are presented. The instrumentation used was a double - beam, modified Perkin-Elmer 621 Spectrophotometer. Results using several randomly roughened metallic surface show good agreement with the existing theory and experimental results.


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