Trenie i Iznos (Friction and Wear), 2006, Vol.27, No.4
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Trenie i Iznos (Friction and Wear), 2006, Vol.27, No.4
Volume 27, Number 4; July--August, 2006
CONTENTS
ARTICLES
Kurbatkin I. I., Bushe N. A., Goryacheva I. G., Zaichikov A. V.
Effect of composition of aluminum antifriction alloys on formation of protective films in contact. pp. 355--360
Summary: Performance characteristics of protective films appearing on the surface of a steel counterbody rubbing against aluminum antifriction alloys are studied. Data on their surface morphology, structure, roughness, and local composition are obtained. Based on the results alloy compositions was corrected and a material was selected demonstrating the best results in all kinds of tests.
Kolesnikov V. I., Kozakov À. Ò., Sidashov A. V., Kravchenko V. N., Sychev A. P.
Diffusion and segregation processes in metal-polymer tribosystem. pp. 361--365
Summary: The elementary composition of defect zones of the working surface of a railway wheel and chips made at different depths under the surface was studied. X-ray and metallographic examinations were also carried out and the microhardness was measured. Segregations of alloying and impurity elements of the wheel, the mated braking block, and environment were found on fracture surfaces and over grain boundaries inside the wheel. This proves severe diffusion and segregation processes occurring among the tribosystem members and environment. Defects in the wheel surface layers and tensile stresses on the wheel surface are shown to promote these processes.
Krasnyuk P. P.
Contact of rigid heat-conductive punch with elastic layer at stationary frictional heat generation. pp. 366--377
Summary: A plane contact problem for a rigid heat-conductive punch of rectangular or circular cross section and an elastic layer is solved. The exact solution of heat conduction equations for bounded bodies is obtained whereby the problem is reduced to a system of integral equations whose structure is governed by the type of thermal conditions on the contact surface. Thus, the problem formulation is approached to a real distribution of thermoelastic stresses and the effect of temperature fields on the magnitude and distribution of contact stresses can be studied more adequately.
Torskaya E. V. and Soshenkov S. N.
Effect of wear on accumulation of contact fatigue damage in rail-wheel pair. pp. 378--387
Summary: The effect of wear on the accumulation of contact fatigue damage in surface layers of bodies under repeated loading is studied. A rail-wheel pair is considered. Changes in contact parameters caused by the displacement of the point of initial rail-wheel contact relatively to the rolling track middle are taken into account. Surface profile variation due to non-uniform wear is also considered. The effect of uniform and non-uniform wear on the rate of the accumulation of contact fatigue damage under the wheel surface is shown.
Mirsalimov V. M.
Minimization of stress state of contact pair bushing. pp. 388--393
Summary: Based on the minimax criterion theoretical analysis was carried out to determine the microgeometry of the surfaces of the bushing and plunger of a friction pair in order to minimize the stress state of the bushing. Calculation was performed for a contact pair used in submersible sucker-rod pumps.
Usov P. P.
On accuracy of numerical solution of EHD problems. pp. 394--402
Summary: A numerical solution of the plain stationary isothermal EHD problem for compressible Newtonian fluid with a high and narrow pressure peak was obtained. One variant of values of the initial parameters was used to exemplify the pattern of the convergence of the pressure and film thickness distribution functions when shortening the grid step. Even though the grid step is long and the number of nodes is small the film thickness and the pressure outside the peak region have a high accuracy. With increasing the contact load the pressure peak shifts towards the outlet and becomes narrower. Under heavy contact loads the lubricant compressibility affects considerably the pressure peak height.
Semchenko N. I., Kazachenko V. P., Popov A. N.
Effect of annealing temperature on protective and tribological properties of multi-layer diamond-like coatings. pp. 403--408
Summary: The effect of the annealing temperature on adhesion, protective, and tribological characteristics of coatings with alternating titanium and diamond-like carbon layers on austenite steel is studied. An optimal temperature of isothermal annealing is determined producing the best combination of the properties of multi-layer coatings.
Bolotov A. N., Novikov V. V., Novikova Î. Î.
Friction of structured magnetic fluid sliding over solid surface. pp. 409--416
Summary: The study of the sliding of magnetic fluid in bearings and seals performed using a magnetic-fluid friction unit model proves the effect of the sliding of magnetic fluid over a solid surface and shows possible ways of controlling it. The results allow the authors to assume that the external friction of magnetic fluid is of thermofluctuational nature.
Zlotnikov I. I., Zubritskii M. I., Selitskii S. F., Solovei N. F., Kozlov A. B.
Water-soluble cooling lubricants based on soaps and silicates. pp. 417--421
Summary: Binary water solutions of sodium silicate and sodium soaps are shown to be a promising base for new cooling lubricants used in metal machining. Sodium oleate and products of the saponification of rape oil and vegetable oil tars were taken as sodium soaps. Criteria of obtaining stable soap-silicate solutions are proposed and their physical-chemical and performance characteristics are studied. Possibilities of the application of the new cooling lubricants in different stages of metal machining are discussed.
Negmatov S. S., Gulyamov G., Almataev T. A.
Antifriction wear-resistant composite materials based on polypropylene for making friction members of cotton machines. pp. 422--428
Summary: The effect of various fillers on physical-mechanical and tribological characteristics of polypropylene-based composites was studied. Compositions of antifriction and wear-resistant materials used in pin units of cotton machines were proposed.
REVIEWS
Myshkin N. K., Petrokovets M. I., Kovalev A. V.
Tribology of polymers: adhesion, friction, wear, and friction transfer. pp. 429--443
Summary: The paper reviews studies in the tribology of polymers carried out during the last five decades. Results of measuring the surface energy of different coatings obtained using a new instrument -- the contact adhesion meter -- are presented. Concepts of the adhesion and deformation components of friction are discussed. The effect of the load, sliding velocity, and temperature on the friction force is described. Different modes of the wear of polymers and their friction transfer are considered.
Bogdanovich P. N., Tkachuk D. V., Belov V. M.
Methods of measuring temperature in friction and machining of solids. pp. 444--456
Summary: The paper reviews methods of measuring the temperature in the zone of solid contact in friction and machining. Operation principles and application of instruments for contact and non-contact temperature measurements are described and their advantages and disadvantages are analyzed as applied to tribological studies. Ways of improving instruments for temperature measurements based on the development of combined measuring systems are outlined.
MEN OF SCIENCE
Nikolai A. Bushe (To 90th anniversary). pp. 457--458
Petr A. Vityaz (To 70th anniversary). pp. 459--460
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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: October 18, 2006
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2006 The National Academy of Sciences of Belarus
Copyright © 2006 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
