Dry friction of pure aluminum against steel

The behavior of aluminum during dry friction against a steel disk is studied. It has been found that, in the course of dry friction, severe wear of the surfaces of both materials occurs. With an increase in the applied pressure, the wear intensity of the friction pair grows, while the coefficient of friction decreases. The examination of the structure of the subsurface layers of the aluminum specimens has shown that the deformation that occurs in these layers makes a substantial contribution to the wear of these specimens.     

Study of plastic shear deformation in surface layer at friction. Simulation results. Part II. Effect of friction parameters

Deformation and temperature in the surface layer of plastic material and thickness of the plasticized layer are calculated using the one-dimensional macroscopic friction model developed in the first part of the paper [1]. We have studied the effect of sliding velocity, contact spot area, hardening ability, and thermal conductivity of material on the frictional heating and plastic deformation of the surface layer during a single touch between the contact spot and counterbody. Repeated contacts of the specimen and counterbody are simulated and the accumulation of plastic shear is considered for different contact spot sizes.     

Application of fractals to the analysis of friction processes

An attempt is made to estimate the fractal dimension of the lateral surface of a steel sample formed as a result of friction by analyzing an image obtained using a scanning electron microscope. Pis’ma Zh. Tekh. Fiz. 25, 82–88 (February 12, 1999)     

Nanoindentation of the surface layer of Hadfield’s steel after sliding friction

We have measured the nanohardness of a deformed near-surface layer of Hadfield’s steel upon friction testing. The phenomenon of shape recovery upon indentation has been observed, which is retained for several days after tribological tests. It s suggested that the strained material exhibits behavior analogous to nonlinear elasticity.     

New wear-resistant materials for heavily loaded cone drill bit slip bearings

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 12, pp. 22–23, December, 1992.     

Effect of heat generation due to plastic deformation on behavior of surface-layer material during sliding

Sliding friction of materials differing in their deformation hardenability is simulated using a modified macroscopic model which allows taking into account of frictional heating, as well as additional heat generation in the material surface layer due to its plastic deformation. Taking into consideration additional heat generation is shown to have an effect on the heat conditions and shear deformation in the surface layer when the deformation hardenability of the material falls within a certain range. Comparative calculations performed with and without consideration of additional heat generation exemplify the quantitative and qualitative differences of heating and plastic deformation of the surface layer.     

Comparative Analysis of Structure and Mechanical Properties of Additive Objects Manufactured by Electron Beam Method and Cold Metal Transfer

Russian Journal of Non-Ferrous Metals - Nowadays prototyping and additive manufacturing of objects are the most promising trends of development. As opposed to more precise powder methods,...     

Structural properties of boride coatings for triboengineering

Boride coatings on steels of different classes are rather widely used for decreasing the intensity of abrasive wear and thermal degradation of the surface of machine parts and equipment. Borating can also be an efficient means for increasing the wear resistance of heavily loaded friction units. The present work presents results of an investigation of the structure and wear resistance of boride coatings on steel 15N3MA. The optimum structure of the boride layer and the range of application of boride coatings are determined.Translated from Metallovedenie i Termicheskaya Obralbotka Metallov, No. 6, pp. 35–38, June, 1995.     

The evolution of the surface layers on metals in sliding friction

The methods of speckle-interferometry, electron, optic, and atom-force microscopy were used to study the structure and regularities of deformation of surface layers on metals and alloys in friction. The causes of deformation localization are analyzed. An explanation of the strong wear resistance of Hadfield steel is proposed using data on the evolution of the surface layer structure.