CLASSIFICATION AND MODELLING OF SOUND EMISSION SIGNALS IN SELECTED TRIBOSYSTEMS

Tribologia ◽  
2021 ◽  
Vol 297 (3) ◽  
pp. 19-26
Author(s):  
Michał Kekez ◽  
Wojciech Jurczak ◽  
Dariusz Ozimina
Keyword(s):  
Silicon Carbide ◽  
Random Forest ◽  
Relative Humidity ◽  
Sliding Friction ◽  
Regression Trees ◽  
Sound Level ◽  
Dry Sliding ◽  
Sound Emission ◽  
Rotating Discs ◽  
Dry Sliding Friction

The paper presents an analysis of the sound level recorded during dry sliding friction conditions. Balls with a diameter of 6 mm placed on pins were made of 100Cr6 steel, silicon carbide (SiC), and corundum (Al2O3), while rotating discs with a height of 6 mm and a diameter of 42 mm were made of 100Cr6 steel. Each pin and disc system was tested for two values of the relative humidity of the air (50 ± 5% and 90 ± 5%). Models of the A-sound level were developed using regression trees and random forest. The paper presents an analysis of the accuracy of the models obtained. Classifications of the six tests performed on the basis of sound level descriptors were also carried out.

Multiple Reflow Influence over the FeCoCrAlTiCuNiMo Coating Obtained by Plasma Metallization on its Wear Resistance under Dry Friction

2021 ◽  
Vol 410 ◽  
pp. 475-481
Author(s):  
Anvar M. Kadyrmetov ◽  
Dmitri A. Popov ◽  
Yevgeny V. Snyatkov
Keyword(s):  
Wear Resistance ◽  
Dry Friction ◽  
Sliding Friction ◽  
Plasma Jet ◽  
Dry Sliding ◽  
Research Results ◽  
Open Atmosphere ◽  
Multicomponent Coating ◽  
Dry Sliding Friction

The article presents the research results of the plasma jet multiple reflow effect over the multicomponent coating FeCoCrAlTiCuNiMo, obtained by plasma metallization in an open atmosphere, on its wear resistance under dry sliding friction. The research results indirectly confirm the influence of the coating entropy over the wear resistance increasing along of the reflow number growth.

Surface Topography Characterization in Steel Running-in Process of Dry Sliding Friction

2013 ◽  
Vol 278-280 ◽  
pp. 414-417 ◽  
Author(s):  
Geng Pei Zhang ◽  
Xiao Jun Liu ◽  
Wen Long Lu
Keyword(s):  
Surface Topography ◽  
Sliding Friction ◽  
Control Surface ◽  
Significant Feature ◽  
Dry Sliding ◽  
Wear Process ◽  
Machine System ◽  
Dry Sliding Friction ◽  
Performance Surface

Running-in is an important and inevitable wear process for machine system, and it plays an indispensable role in extending service life and improving operating performance. Surface topography appears as a significant feature of friction pairs. Therefore, study on modification of surface topography in running-in is crucial to control surface quality and then achieve improvement of machine system. In this paper, to understand the evolution of surface topography in running-in process, steel dry sliding running-in experiments were conducted, and surface topographies in running-in were evaluated with the areal surface evaluation parameters. The results reveal that surface topography evaluation could provide valuable information about wear status of steel running-in process of dry sliding friction, amplitude parameters, area and volume parameters, and hybrid parameters play different and important roles in characterization of surface topography modification in running-in.

scholarly journals Suppression of wear in dry sliding friction induced by negative thermal expansion

2020 ◽  
Vol 102 (4) ◽  
Author(s):  
Aleksandr S. Grigoriev ◽  
Evgeny V. Shilko ◽  
Andrey I. Dmitriev ◽  
Sergey Yu. Tarasov
Keyword(s):  
Thermal Expansion ◽  
Sliding Friction ◽  
Negative Thermal Expansion ◽  
Dry Sliding ◽  
Dry Sliding Friction
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