Reference materials are in vogue. Reference methods for tribotesting are not available on a broad scale. Meaningful test methods working with simple specimens are of great interest for the calibration of results of tribological laboratory tests and also for the comparison of results from different sources. Gross slip fretting tests were performed at room temperature with a ball-on-flat configuration, using bearing steel (100Cr6, AISI 52100) easily available world-wide. The scatter of friction and wear quantities was evaluated for tests with three different stroke values. In order to determine the effect of relative humidity (RH) on friction and wear results additional tests were performed in dry air and in moist air. The different methods of describing fretting results are discussed and recommendations are derived for the meaningful quantitative description of friction and wear results. On the basis of influence of stroke and RH on friction and wear results, proposals are given for the use of a fretting test as a reference procedure. Copyright © 2006 John Wiley & Sons, Ltd.
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