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Experimental discrimination of plowing friction and shear friction
Authors:J.-D. Kamminga  G.C.A.M. Janssen
Affiliation:(1) 39 Quai Lucien Lefranc, 93303 Aubervilliers Cedex, France;(2) Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
Abstract:The friction of a diamond spherical indenter sliding on CrN coated nitrided steel was investigated. A friction model was proposed that takes into account plowing and shear friction. With the model the separate contributions of substrate properties and surface condition to the friction were successfully extracted: the shear friction coefficient μ sh was found to depend exclusively on the surface condition, i.e., not on load on the indenter, hardness of the substrate, and thickness of the coating. On the other hand, the plowing component of friction was independent on surface condition.
Keywords:sliding friction  plowing  elastic recovery  scratch test  CrN coating
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