Roughness parameters are important characteristics
in the manufacturing and friction of materials.
Variations in the roughness parameters during
motion can be used to estimate the longevity of
rubbed surfaces. In the Theoretical Background
section of this paper, the feasibility of using the
eddy current technique for measuring the roughness
parameters of nonferrous and ferrous metals, and
specifically steel surfaces, is demonstrated. Eddy
current tests were performed using a commercial
manual flaw detector with pencil probes. In the
Experimental Procedure sections, the roughness
parameters of ferrous and nonferrous metals were
evaluated in static conditions using eddy current
technique measurements. Eddy current technique
data were compared with the values of the
roughness parameters measured by a profilograph.
Good correlation was obtained between the eddy
current technique and profilograph measurements.
Finally, the roughness parameters were evaluated
under dynamic conditions during friction tests. The
results confirmed the applicability of the eddy
current technique for measuring the roughness
parameters both under static and dynamic conditions.
The new methodology and a probe holder
design for estimation of roughness parameters in
static and dynamic conditions were developed. This
methodology excludes the noise factors in the
roughness measurement parameters.
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