The calculation of wear coefficients for plastic contacts

Effect of molybdenum on the microstructure and wear resistance of Fe-based hardfacing coatings

“…In addition, for hardfacing alloy with Mo, it is found that there exist few of fluctuation in the values of the friction coefficient. A possible explanation for such fluctuations in the friction coefficient values has been suggested on the basis of a 'stick and slip' mechanism [18]. As the asperities adhere during the wear, the moving parts stick, leading to a high friction values.…”

A method for calculating boundary friction and wear

“…γ e effective plastic shear strain (SLF) η angle in slip-line field µ coefficient of friction τ shear strength of interface (MPa) model is required [9]. Thus, the agreement found [2] must be explained by two erroneous assumptions cancelling each other out. There remains the method of surface characterisation used.…”

“…In order to predict with any precision the influence of contact conditions upon K, it is first necessary to have a satisfactory model of the mechanics of wear. One possibility, which has been suggested by several workers [2][3][4][5][6][7][8][9][10], is to calculate the surface plastic strain produced by asperity interaction, then to use a damage rule to relate it to the wear rate. This requires a model which predicts the extent and rate of strain due to sliding, and the amount of strain needed to produce wear particles.…”

“…A first attempt at such a synthesis was made over ten years ago [2], in which strain was predicted with a rigid-plastic asperity deformation model, originally developed by Green [11] and Challen and Oxley [12]. A simple, constant shear stress rheology was used to model the interface, and the effect of the surface texture of the wearing surfaces was incorporated using slope statistics, unambiguously determined from a physically significant bandwidth of the surface profile [13].…”

Experimental Research on the Determination of the Coefficient of Sliding Wear under Iron Ore Handling Conditions

“…It was obtained that K varies largely from smooth (and/or lubricated) surface to rough (and/or unlubricated) surface. Using the low cycle fatigue mechanism and the slipline fields, Lacey and Torrance [5] express K differently with respect to the low and the high slopes. This work confirmed that K increases dramatically with increasing contact friction.…”