scholarly journals The Influence of Disc Surface Topography after Vapor Blasting on Wear of Sliding Pairs under Dry Sliding Conditions

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 102 ◽  
Author(s):  
Dzierwa ◽  
Pawlus ◽  
Zelasko
Keyword(s):  
Surface Topography ◽  
Tribological Properties ◽  
White Light ◽  
Dry Friction ◽  
Dry Sliding ◽  
Disc Surface ◽  
Steel Disc ◽  
42Crmo4 Steel ◽  
Wear Tests ◽  
Ball On Disc

Wear tests were performed using a ball-on-disc tribological tester. In this study, 42CrMo4 steel disc of hardness 40 HRC co-acted with 100Cr6 steel ball with hardness of 60 HRC. Disc surfaces were created using vapor blasting to obtain values of the Sq parameter close to 5 µm. However, other disc surface topography parameters varied. Dry friction tests were carried out. Wear levels of discs and balls were measured using a white light interferometer Talysurf CCI Lite. It was found that the surface topography had a significant impact on tribological properties under dry sliding conditions. The research also allowed to identify significant dependencies between surface topography parameters and wear.

scholarly journals The Effect of Ball Burnishing on Tribological Performance of 42CrMo4 Steel under Dry Sliding Conditions

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2127 ◽  
Author(s):  
Slawomir Swirad ◽  
Pawel Pawlus
Keyword(s):  
Residual Stresses ◽  
Friction And Wear ◽  
Tribological Performance ◽  
Dry Sliding ◽  
Ball Burnishing ◽  
Surface Topographies ◽  
42Crmo4 Steel ◽  
Compressive Residual Stresses ◽  
Wear Tests ◽  
Ball On Disc

Ball burnishing appears to be a very promising approach for reducing surface height, generating compressive residual stresses and increasing hardness. Ball burnishing treatment was carried out using a Haas CNC Vertical Mill Center VF-1 equipped with the Ecoroll burnishing system. After burnishing, surface topographies of machined samples and hardness were measured. Wear tests were conducted using a ball-on-disc tribotester in dry sliding conditions. During tests, the friction force was monitored as a function of time. After tests, wear volumes were determined on the basis of surface texture measurements. Tests revealed that ball burnishing in most cases resulted in minimizing friction and wear of contacting elements.

The Study of the Tribological Properties of One-Process and Two-Process Textures after Vapour Blasting and Lapping Using Pin-on-Disc Tests

2012 ◽  
Vol 527 ◽  
pp. 217-222 ◽  
Author(s):  
Andrzej Dzierwa ◽  
Pawel Pawlus ◽  
Wieslaw Zelasko ◽  
Rafal Reizer
Keyword(s):  
Friction Force ◽  
Tribological Properties ◽  
Boundary Lubrication ◽  
White Light ◽  
Contact Conditions ◽  
White Light Interferometer ◽  
Pin On Disc ◽  
Steel Disc ◽  
Lubrication Condition ◽  
Wear Tests

Wear tests were conducted using a pin-on-disc tester. In the experiment, a steel disc of hardness 40 HRC was put in contact with a steel pin of hardness 64 HRC with spherical end. Disc samples were prepared in order to obtain very similar values of the Sq parameter of one-process and two-process isotropic surfaces. Height of one–process disc surfaces, characterized by the Sq parameter was in the range 0.5 – 6 µm, but of two-process textures 1- 4.5 µm. Dry and lubricated tests, using different contact conditions were carried out. During testing, the friction force was monitored as a function of time. Wear of disc was measured after the test using white light interferometer. Tests under boundary lubrication condition were done using L-AN 46 oil.

scholarly journals The Effect of Surface Texturing on Dry Gross Fretting

Lubricants ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 92 ◽  
Author(s):  
Agnieszka Lenart ◽  
Pawel Pawlus ◽  
Slawomir Wos ◽  
Andrzej Dzierwa
Keyword(s):  
Friction And Wear ◽  
Surface Texturing ◽  
Tribological Performance ◽  
Disc Surface ◽  
Abrasive Jet Machining ◽  
Wear And Friction ◽  
Steel Disc ◽  
Disc Configuration ◽  
Effect Of Surface ◽  
Ball On Disc

The effect of steel disc surface texturing on dry gross fretting in a ball-on-disc configuration was studied. Dimples were created with abrasive jet machining. The tribological performance of sliding pairs, steel–steel and steel–ceramics, was experimentally studied. The character of surface texturing effect was related to the dominant wear type. During steel–steel contact, the presence of dimples on disc surfaces could lead to increases in wear and friction. However, the escape of wear debris into dimples could result in reductions of friction and wear in the steel–ceramics configuration.

The effect of ceramic tribo-elements on friction and wear of smooth steel surfaces

2018 ◽  
Vol 233 (3) ◽  
pp. 456-465
Author(s):  
Andrzej Dzierwa ◽  
Pawel Pawlus ◽  
Rafal Reizer
Keyword(s):  
White Light ◽  
Wear Debris ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Volume ◽  
Dry Sliding ◽  
Pin On Disc ◽  
Optical Profilometer ◽  
42Crmo4 Steel ◽  
Steel Surfaces

The pin-on-disc dry sliding friction and wear experiments have been made on 42CrMo4 steel in contact with Si3N4, SiC, WC, Al2O3, and ZrO2 ceramic balls. The tests were carried out at sliding speeds of 0.16 m/s, 0.24 m/s, and 0.32 m/s. During the tests, the friction force was monitored as a function of time. Discs and balls wear was measured after the tests using a white light interferometer Talysurf CCI Lite and Altisurf 520 optical profilometer with a CL1 confocal probe. To decrease variations in the experimental results, during the tests, wear debris was continuously removed from the disc surfaces. It was found out that with Al2O3 counterpart the wear volume of the steel discs was the largest. However, the largest wear volume of the balls was observed for Si3N4 ceramic balls.

TRIBOLOGICAL PROPERTIES OF Al2O3/ZrO2 SINTERED CERAMICS

Tribologia ◽  
2019 ◽  
Vol 283 (1) ◽  
pp. 67-72
Author(s):  
Grzegorz WIĄZANIA ◽  
Marcin KOT ◽  
Agnieszka WOJTECZKO ◽  
Zbigniew PĘDZICH
Keyword(s):  
Composite Materials ◽  
Tribological Properties ◽  
Dry Friction ◽  
Elevated Temperatures ◽  
Friction Contact ◽  
Manufacturing Costs ◽  
Mechanical And Tribological Properties ◽  
Complex Shapes ◽  
Ball On Disc

The paper presents mechanical and tribological properties of Al2O3/ZrO2 composite sinters with different proportions of Al2O3 and ZrO2 phases. These materials are commonly used in dry friction contact due to relatively low manufacturing costs of even complex shapes of products and the possibility of working at elevated temperatures. The tests were carried out by the ball-on-disc method at temperatures of 20, 150, 300, and 500°C. A ball made of Al2O3 was used as a counterpart. The results were compared with the following sintered mono-phase materials: Al2O3(alumina) and tetragonal yttria-stabilized ZrO2 polycrystallines (Y-TZP). The tests showed the significantly better properties of composite materials.

Tribological properties of bronze surface with dimple textures fabricated by the indentation method

2020 ◽  
Vol 234 (10) ◽  
pp. 1680-1694
Author(s):  
Jianzhao Wu ◽  
Aibing Yu ◽  
Qiujie Chen ◽  
Maochao Wu ◽  
Lei Sun ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Wear Debris ◽  
Surface Texturing ◽  
Experimental Results ◽  
Indentation Method ◽  
Dimple Surface ◽  
Mechanical Components ◽  
Wear Tests ◽  
Ball On Disc ◽  
Worn Surfaces

Surface texturing is an effective approach to improve the tribological properties of mechanical components. An indentation method is presented to fabricate dimple textures on bronze specimen surfaces. Graphite was selected as the mating balls in ball-on-disc wear tests. The worn surfaces and the indented dimples heaped with the thin ribbon debris were observed by microscope. The morphology and evolution of wear debris were employed to explain the influence of indented dimple textures. The experimental results indicate that the generation of thin ribbon debris is due to the edge hardening of indented dimple. The thin ribbon debris and the indented conical dimple are conducive to the debris heaping on slopes of dimples, which can facilitate the formation of the graphite-rich transfer layers on indented dimple surface. Compared with nontextured surface, indented dimple surface has lower coefficients of friction and slighter wear. The tribological properties of indented dimple surface are improved because of the edge hardening, the debris heaping and the formation of transfer layers.

EFFECTS OF SURFACE PREPARATION ON FRICTION AND WEAR IN DRY SLIDING CONDITIONS

Tribologia ◽  
2017 ◽  
Vol 272 (2) ◽  
pp. 25-31
Author(s):  
Andrzej DZIERWA
Keyword(s):  
Surface Topography ◽  
Friction And Wear ◽  
Normal Load ◽  
Surface Preparation ◽  
Wear Volume ◽  
Dry Sliding ◽  
Initial Surface ◽  
Steel Disc ◽  
Similar Range ◽  
Sliding Distance

Wear tests were conducted using a ball-on-disc tester T-11. In the experiment, a 42CrMo4 rotating steel disc with a hardness of 40±2 HRC was placed in contact with a 100Cr6 steel ball with a diameter of 6.35 [mm]. The hardness of the ball was set to 62±2 HRC. Finishing treatment applied to the surfaces was sand blasting. Disc samples were prepared to obtain surfaces in similar range of the Sa parameter (arithmetical mean height of the surface) but other surface topography parameters vary. Dry sliding tests were conducted at sliding speeds of v1 = 0.16; v2 = 0.24 i v3 = 0.32 [m/s]. The sliding distance was set to 282.6 [m], and the normal load was set to 9.81 [N]. During the tests, the friction force was monitored as a function of time. Disc and ball wear was measured after the tests using a white light interferometer Talysurf CCI Lite. Profiles were taken in four positions (900 apart) perpendicular to the wear track. Then, using an interferometer software program TalyMap Gold 6.0, they were computed and averaged. It was found that the initial surface topography has a significant influence on friction and wear levels under dry sliding conditions. It was also identified the correlation between several surface topography parameters and wear volume.

scholarly journals Wear of a rough disc in dry sliding contact with a smooth ball: experiment and modeling

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Andrzej Dzierwa ◽  
Pawel Pawlus
Keyword(s):  
Strong Correlation ◽  
Sliding Contact ◽  
Dry Sliding ◽  
Volumetric Wear ◽  
Sliding Surfaces ◽  
Rotating Discs ◽  
Dry Contact ◽  
42Crmo4 Steel ◽  
Disc Configuration ◽  
Ball On Disc

AbstractThe main objective of this work is to model wear of a disc which was subjected to dry contact with a ball in unidirectional sliding. Tribological tests of sliding pairs were carried out using a tribological tester T-11 in a ball-on disc configuration. Stationary balls made of 100Cr6 steel with a hardness of 62 ± 2 HRC co-acted with rotating discs with 42CrMo4 steel with a hardness of 40 ± 2HRC. Discs were machined by lapping, grinding, milling, and vapour blasting. The values of the Sq parameter of disc surfaces were between 0.1 and 5.86 µm. Wear volumes of the discs were lower for bigger roughness heights. The simulation of disc wear was conducted on the basis of the repetitive contact between sliding surfaces. Strong correlation was achieved between the modeled and measured volumetric wear levels.

scholarly journals Tribological properties of aluminium alloy surface layer after finishing treatments

Mechanik ◽  
2018 ◽  
Vol 91 (7) ◽  
pp. 492-495
Author(s):  
Janusz Kalisz
Keyword(s):  
Surface Layer ◽  
Tribological Properties ◽  
Dry Friction ◽  
Ball Burnishing ◽  
Abrasive Resistance ◽  
Ceramic Ball ◽  
Al2o3 Ceramic ◽  
Volume Wear ◽  
Alloy Surface Layer ◽  
Ball On Disc

Investigation’s results of the surface geometric structure and tribological properties of the aluminum alloy EN AW-AlCu4MgSi(A) processed by various finishing treatments: grinding, polishing and ball burnishing are presented in the paper. The test of abrasive resistance and friction coefficient determination was carried out by usage of the T-01M tester. The tests were carried out under dry friction conditions using the ball-on-disc method. As a counter-sample, a polished Al2O3 ceramic ball with a diameter of 6 mm was used. After burnishing, comparing to grinding and polishing, an approximate twice reduction of the volume wear rate was obtained. Depending on the type of surface treatment mean friction coefficients are 0.45 after grinding, 0.34 after polishing and 0.32 after ball burnishing.

Tribological Properties of PVD CrAlN Coating Tools

2013 ◽  
Vol 706-708 ◽  
pp. 375-378
Author(s):  
Ai Hua Liu ◽  
Jian Xin Deng ◽  
Peng Zhang
Keyword(s):  
Tribological Properties ◽  
High Speed ◽  
Vapour Deposition ◽  
Test System ◽  
Test Results ◽  
Wear Properties ◽  
Low Load ◽  
Cathodic Arc ◽  
Wear Tests ◽  
Ball On Disc

The paper reports the tribological properties of the CrAlN coating tools at different speeds and loads. The coating was deposited on cemented carbide by cathodic arc physical vapour deposition technique. Ball-on-disc wear tests were performed on the CETR UMT-2 test system against SiC balls. The coating character and test results were obtained through SEM, XRD and Wyko surface profilometer. The results are as follows: The value of friction of coefficients decreased and depth of wear tracks became sallower as speeds increased and the coating presented adhesion phenomenon under low load. CrAlN coating showed excellent anti-wear properties at high speed and low load, and was more suitable for these similar working conditions.

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