Email this article METHODOLOGICAL FOUNDATIONS OF THE MATERIALS SCIENCE ASSESSMENT OF THE QUALITY OF LUBRICANTS FOR LOADED INTEGRATIONS OF MACHINES AND MECHANISMS. MESSAGE 2. THE INFLUENCE OF THE COMPOSITION OF LUBRICANTS ON THE STRUCTURAL AND PHASE STATE OF THE DEFORMATION ZONE OF METAL TRIBOUNITS AND THEIR ANTIFRICTION PROPERTIES
- Authors: Kuksenova L.I.1,2, Savenko V.I.3
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Affiliations:
- Science Institute of Mechanical Engineering named after A.A. Blagonravov of the Russian Academy of Sciences (IMASH RAS)
- National Research Center «Kurchatov Institute» (SIC «Kurchatov Institute» – VIAM), SSC RF
- Issue: No 12 (2024)
- Pages: 3-14
- Section: Materials science in mechanical engineering
- URL: https://journals.rcsi.science/2223-4608/article/view/280150
- DOI: https://doi.org/10.30987/2223-4608-2024-3-14
- ID: 280150
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Abstract
The results of experimental studies of deformation and diffusion in the surface layers of metallic frictional couples, which form the experimental and theoretical basis of the materials science approach to the quality evaluation of lubricants, are presented. The concepts of the component’s role for the lubricating medium in the implementation of the plasticizing and strengthening triboeffect are formulated. Structural condition characteristics for the surface layers of copper alloys during friction on steel in the mode of boundary lubrication in surface-active lubricants, are described. The conditions for achieving minimum power losses of such tribosystems for friction and wear have been found. The greatest service life of tribounit in a lubricating medium containing surfactants is resulted from wear resistance increase of a copper alloy with a relative decrease in hardness and increased plasticity of its surface layer. At the same time, a decrease in hardness due to the plasticizing effect of surfactants occurs only in the near-surface deformed layer of tribomaterial, while in its deeper layers with no plasticization resulted from a lubricating medium effect, the mechanical characteristics of the antifriction alloy remain at the required high level. It is demonstrated that alloys with a single-phase structure of an α-solid solution and a wide concentration range of solubility of the alloying element in the solid state meet these requirements. It is found that such boundary conditions are provided by the presence of stationary macroscopic diffusion flows of alloying elements in the zone of contact deformation of a polycomponent tribomaterial. The role of local diffusion phenomena in quasispinodal phase transitions is indicated. Examples of the selective transfer phenomenon during friction in industrial lubricants, are given.
About the authors
Lidiya Ivanovna Kuksenova
Science Institute of Mechanical Engineering named after A.A. Blagonravov of the Russian Academy of Sciences (IMASH RAS); National Research Center «Kurchatov Institute» (SIC «Kurchatov Institute» – VIAM), SSC RF
Email: lkukc@mail.ru
Vladislav Il'ich Savenko
ORCID iD: 0000-0002-3670-7716
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