PSI - Issue 59

Victor Aulin et al. / Procedia Structural Integrity 59 (2024) 428–435 Victor Aulin et al./ Structural Integrity Procedia 00 (2019) 000 – 000

430

3

main tribotechnical indicators: wear intensity І, coefficient of friction µ, temperature Т, contact resistance parameters (CRP) triboconjugations of samples and details R under different modes of friction and wear, also time parameters of dissipative secondary structures (DSS) in run-in modes have been measured A comprehensive study of the friction surfaces covered with dissipative secondary structures was carried out using the electron microscopic method combined with the determination of the elemental composition of the materials of the friction surfaces (scanning microscopes СAMEBAX, CAMSCAN 4DV, system LINK – 480). The presented materials are generalized and based on the results of a comprehensive study of friction and wear processes in the frictional contact zone (Aulin et al., 2020; Pashechko et al., 2019; Aulin et al., 2022). The aim of the study is to identify the nature of the relationship between the wear intensity parameters, the contact electrical resistance of the tribo couplings of the samples, the relative time of existence of continuous oil layers and the characteristics of the dissipative secondary structures depending on the mode of friction and wear.

Fig. 2. The general scheme of the universal friction machine (friction unit and loading mechanism) for the study of tribocouples of samples and parts. The contact scheme of the rod (end surface of the sample) - the end surface of the disc (counterbody); Р – specific load, ω – frequency of rotation against the body. 3. Experimental results The general pattern of changes in wear intensity I and contact resistance (CRP) R tribo coupling of samples and parts is presented as a dependence on the main force parameters of the load, materials of tribo coupling of parts and samples and the external environment. A correlation dependence between these parameters and the processes of formation, transformation and destruction on the friction surfaces, in the mode of normal friction and wear, of the corresponding type of dissipative secondary structures (DSS І, DSS ІІ), which ar e dielectrics as well as oil layers in the contact zone, was revealed (fig. 3).