Abstract
Research was conducted to determine the effect of lubricants on stress and strain in the contact of metal surfaces. Experiments were carried out on the introduction of a fixed and moving indenter in contact with a dry and lubricated surface.The steel spherical specimen was pressed into a lubricated and dry metal surface. The microstructures of the structure of the surface layer are studied under various conditions of deformation. The diagrams of the relative deformation of the surface layers are constructed. The mechanism of the formation and distribution of internal stresses for dry and greased contact is described. Experimental studies of the introduction of a moving steel indenter into a lubricated surface have been carried out. The relationship of the deformation mechanisms of lubricated surfaces with their wear resistance is determined. The results obtained are recommended for predicting the durability of lubricated friction units according to the criterion of contact strength.
Highlights
Most of the machines’ friction units operate in the conditions of boundary lubrication of contacting surfaces
The depth of the grain deformation layer is steady over the entire surface of the deformation hole. Such a difference in the surface layer material deformation determines its stressed state in the case of dry and lubricated contact
This contributes to increased wear resistance compared to contacting surfaces without lubrication
Summary
Most of the machines’ friction units operate in the conditions of boundary lubrication of contacting surfaces. While designing and improving these units, it is necessary to determine the force conditions of contact interaction and, first of all, normal pressures and shear stresses [1,2,3,4]. In the condition of lubricant’s presence, pressure calculation is possible only if there is data on the normal deformation properties of surfaces coated with a layer of a lubricating film. The analysis of the received results shows that in all cases, the indenter penetration (deformation) into a lubricated surface is larger than into a dry one the technology there is a continuous process of improving the machines and their components
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
