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New interpretation approaches for seizure load tests on the translatory oscillation tribometer (SRV)
(2016)
When looking in detail at analyses of the tribological load-carrying capacity of high-performance lubricants, it becomes apparent that the stop of the machine of an exclusive evaluation of the development of the coefficient of friction cannot provide any sufficient criteria for determining the occurrence of adhesive failure. This is due on the one hand to the increasing complexity of lubricant formulae and sophisticated additive packages, and on the other hand to the increasing frictional power capacity of modern drive and control concepts in the design of tribometers. For this reason, it is urgently needed to examine the adhesive processes and their detection in more detail with the help of appropriate tribological values and criteria. The evolution of the friction can be coupled with the stroke, contact resistant and/or noise emission. Besides from new criteria for adhesive failure, which were compiled by the work group for the relevant ISO, DIN and ASTM standards, this contribution discusses the inclusion of additional parameters. Among other things, it provides guidance on what evidence the continuous recording of the original coefficient of friction and position signals, the electrical contact resistance, temperature, noise emission, frictional power input of the machine and further derived parameters help to identify adhesive failures or events.