Трение и износ, 2000, Vol.21, No.5
/ Издания академии / Научные журналы
Трение и износ, 2000, Vol.21, No.5
Том 21, номер 5; сентябрь-октябрь, 2000
СОДЕРЖАНИЕ
СТАТЬИ
Krishtafovich A.A., Martynyak R.M.
Frictional contact between two elastic semiplanes with wavy surfaces. pp. 465--473
Summary: Contact interactions between two elastic semiplanes with friction is considered when one of them has a periodic boundary relief. The cases of isotropic and anisotropic elastic characteristics of contacting bodies have been studied. The geometrical characteristics of interphase clearances have been analyzed for the sinusoidal surface relief.
Bufeev V.A.
The mechanofrictional effect and the force of external friction. pp. 474--480
Summary: The essence of a new mechanofrictional effect is formulated. The problem of the point of application of the force of external friction is analyzed based on the idea of external friction as a physical dissipative process evolving simultaneously on the contact surface and in the volume of rubbing bodies. Methods are proposed to assess the contribution of the surface (adhesive) and volume (deformational) components to the total force of friction. The evolution of a new scale effect during external friction is highlighted as possible.
Podmastertyev K.V.
The effect of deviations of the macrogeometries of the rolling tracks of races on the probability of microcontacting in a bearing. pp. 481--488
Summary: It is proposed how to model the process of microcontacting in the bearing mathematically taking into consideration the real macrogeometry of the working surfaces of its components. The results are shown of theoretical studies of the effect of deviations of the macrogeometries of the rolling tracks on the bearing races on the probability of microcontacting in the friction zone and the function of changes of the probability of microcontacting in the bearing in time. Informative parameters are validated which allow to diagnose the dominating type of macrodeviations of the rolling track of the race, to assess its orientation and significance. The shown results of experimental studies corroborate the theoretical postulates.
Pinchuk L.S., Kadolich Zh.V., Tsvetkova E.A., Nikolaev V.I.
The electrochemical factor of wear of endoprothetic devices. pp. 489--493
Summary: Causes of premature failure of the total hip joint prosthesis have been analyzed in which a "superiughmolecular polyethylene -CoCrMo" couple is used. It has been established that appearance of an electrochemical circuit in the implanted endoprosthetic ball head from a metallic alloy causes an abnormally high linear wear rate (up to 1.5 mm / year). In this case the head and the porous titanium insert on the proximal portion of the endoprosthesis foot for growing into the sponge bone come to act as electrodes. This circuit has caused an unexpected result of disastrous wear of the metallic head, meanwhile the interfaced polymeric insert would wear significantly less.
Korolev P.V., Savchenko N.L., Bykov E.V., Melnikov A.G., Kulkov S.N.
Structural modifications of the friction surface and triboengineering characteristics of ZrO2--Y2O2 ceramics. pp. 494--500
Summary: The structure of the friction surface and the triboengienereing characteristics of ZrO2 + 3 mol. % Y2O3 ceramics have been investigated during friction over a steel disk. It is demonstrated that quasiperiodic systems of cracks and a transfer layer originate on the ceramic friction surface. It has been observed that the wear rate of the ceramics correlates with the spacing between the cracks oriented perpendicularly to the direction of sliding and with the quantity of the materials of the counterbody on the ceramic surface.
Makarov A.V., Korshunov L.G., Solodova I.L.
Wear resistance and deformation hardening of high-carbon and low-alloyed high-speed steels in sliding friction under heavy contact loading. pp. 501--510
Summary: Tempered high-carbon (0.38--1.35 mass % of С), high-speed steels, without annealing or after annealing at 200 °C, additionally alloyed with 1.2-2.0 mass % of V, Mo, Mn, Si, and Cr, and steel Y8 after annealing at 100-600 °C, were friction loaded with a hard-alloy indentor in order to study their tribological features and deformation hardening. The strength features of ultradispersed structures produced by friction on the sliding surfaces of these materials are treated.
Bespalov V.V., Gritsenko B.P.
Some specific features of failure of hadr-alloy cutters. pp. 511--517
Summary: Specific features of failure of hard-alloy cutters have been studied. It has been established that the edges of cutters fail in stages by fragmentation with the appearance of mesostrips. It is shown that surface ultrasound acoustic standing waves generated in the process of turning of steel may play an essential role in the failure of cutters.
Korotkevich S.V., Dubravin A.M., Martynenko S.M.
The effect of the chemical composition and the structure of steel oxide films on their triboengineering behavior. pp. 518--526
Summary: The mechano-physical, antifrictional and wear resistant features of oxide films have been studied. The methods of X-ray photoelectron spectroscopy, atom force microscopy and electrophysical probing have served to study the triboengineering and physical behavior of the steel surface. It has been established that the chemical composition and the structure of the oxide film govern the mechanism of its failure.
Vityaz P.A., Zhornik V.I., Kukareko V.A., Kalinichenko A.S., Gilnich N.E.
The effect of the friction couple material on the triboengineering features of the consistent grease modified with ultradispersed diamonds. pp. 527--533
Summary: The effect of the additives of ultradispersed diamonds (UDD) in consistent grease LT 8102 on the tirboengineering features of copper--steel and steel--steel friction couples has been studied. It is shown that itroduction of UDD into the grease for lubricating steel-on-steel friction couples intensifies the running-in of the tribocouple, facilitates the appearance of a mirror-smooth friction surface and reduces the friction coefficient by 15% at the steady wear stage. When the UDD-modified grease is used to lubricate the copper-on-steel couples, periodic seaziure between the copper and steel occurs intensifying wear compared with the use of the nonmodified grease. An explanation of the mechanism the UDD effect is proposed.
Belotserkovskii M.A.
Triboengineering characteristics of gas plasma coatings. pp. 534--539
Summary: The results of studies of the triboengineering behavior (the friction coefficient, the wear rate) of the coatings produced by gas plasma sputtering of powder and wire materials are shown. The spheres of efficient application of gas plasma coatings in friction units of machines are identified.
Gershman I.S.
Compatibility of current collecting materials in friction. pp. 540--543
Summary: Compatibility of current collecting carbon and metal ceramic materials has been studied along one and the same copper contact wire stretch. It is shown that their combined use can singificantly increase the wear rate of the copper wire and carbon inserts and strongly reduce the wear rate of metal ceramics. The obtained experimental results are discussed from the viewpoint of the theory of self-organization and thermodynamics of irreversible processes.
Markov D.P.
Performance of wheel-rail lubricating materials. pp. 544--550
Summary: Basic ideas and definitions relating to the role of a lubricating material in tribosystems are analyzed. It has been endeavored to systematize the properties of lubricating materials. Methods and the results of assessment of the transfer potential and the sable amount of some wheel-rail lubricating materials are disclosed.
Rodnenkov V.G.
Potentiometric studies of the features of the steel friction surface after dynamic contact with liquid crystalline additives in lubricants. pp. 551--557
Summary: The results are shown of the studies of the effect of the molecular structure of cholesterol n-alcanoates introduced into vaseline oil on the reactions of the friction surface of steel 08 HI to corrosion. It is shown that a metallic layer appears on the steel friction surface having the structure with a typically small current of self-dissolution and a stronger tendency towards cathode reduction of hydrogen at a potential different from the stationary when the oil is present. The structure with these features does not appear on the friction surface in the oils with other cholesterol n-alcanoates. The tendency of the steel surface after friction towards anode dissolution at potentials different from the stationary is independent of the molecular structure of cholesterol n-alcanoates.
Pekoshevsky V.
Study of the effect of roughness of the surface and its orientation on the oil film durability. pp. 558--564
Summary: The effect of roughness of the surface and its structure orientation on the oil film durability in the linear interface have been determined. The method of identification of metallic microcontacts has been used implying both qualitative and quantitative determination of short-lasting contacts in the interface. The results of the study are shown as functional relationships between the relative duration of microcontacts in the friction zone and the sliding velocities, characteristics of roughness and characteristics of the lubricating material. The obtained results prove the effect of roughness and anisotropy of surface microgeometrical structural on the load carrying capacity of the lubricating layer.
Krasnov A.P., Afonicheva O.V., Popov V.K., Nemeryuk D.A., Klabukova L.F., Makarova T.N.
Tribochemical processes in the super high molecular polyethylene filled with hydroxiapatite. pp. 565--569
Summary: The friction and wear of materials based on the super high molecular polyethylene (SHMP) filled with natural hydroxiapatite (HAP) have been studied. It is demonstrated that HAP rendered partially amorphous is an active filler for SHMP improving its mechanophysical features and triboengineering behavior.
Zamyatin A.Yu., Zamyatin V.Yu.
Development of a system of computer calculations and experimental determination of the parameters of frictional fatigue of linearly contacting surfaces.Part 3. UFU-4A installation and its instrumentation. pp. 570--572
Summary: The design and the principle of operation of a new experimental UFU-4A installation are described intended to test surfaces in nominally linear contact for friction fatigue.
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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: December 19, 2000
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2000 The National Academy of Sciences of Belarus
Copyright © 2000 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
