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.

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 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.

scholarly journals Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3429 ◽  
Author(s):  
Agnieszka Skoczylas ◽  
Kazimierz Zaleski
Keyword(s):  
Surface Layer ◽  
Residual Stresses ◽  
Laser Cutting ◽  
Experimental Studies ◽  
Hardened Layer ◽  
Ball Burnishing ◽  
Absolute Value ◽  
The Impact ◽  
Compressive Residual Stresses

In this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of these parts. Laser-cut parts often require finishing to improve the quality of their surface. The tests performed in this study were aimed at assessing whether ball burnishing could be used as a finishing operation for parts of this type. Ball burnishing tests were performed on an FV-580a vertical machining centre using a mechanically controlled burnishing tool. The following parameters were varied during the ball burnishing tests: burnishing force Fn, path interval fw and the diameter of the burnishing ball dn. Ball burnishing of laser-cut C45 steel parts reduced the surface roughness parameters Sa and Sz by up to 60% in relation to the values obtained after laser cutting. Finish machining also led to the reorganization of the geometric structure of the surface, resulting in an increase in the absolute value of skewness Ssk. This was accompanied by an increment in microhardness (maximum microhardness increment was ΔHV = 95 HV0.05, and the thickness of the hardened layer was gh = 40 µm) and formation of compressive residual stresses in the surface layer.

Experimental Analysis of Chromium Molybdenum Coatings Under Mixed Elastohydrodynamic Lubrication for Film Thickness, Friction, and Wear Characterizations

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
David Pickens ◽  
Zhong Liu ◽  
Takayuki Nishino ◽  
Q. Jane Wang
Keyword(s):  
Film Thickness ◽  
Friction And Wear ◽  
Elastohydrodynamic Lubrication ◽  
Tribological Performance ◽  
Root Mean Square Roughness ◽  
Boundary Lubrication Friction ◽  
Lubricant Film Thickness ◽  
Free Surfaces ◽  
Surface Topographies ◽  
Coated Surfaces

This research aims to evaluate the tribological performance of chromium molybdenum (CrMo) coatings under point and line-contact mixed elastohydrodynamic lubrication. This article studies the coatings made from two different methods and treated in an electrifying process of different durations, which produced microchannels and micropockets in the surfaces. The resulting surface topographies had varying impacts on lubricant film thickness, friction, and wear. Root-mean-square roughness (Sq) and porosity are used to characterize the surfaces and their performances in terms of film thickness, friction, and wear. The results suggest that the coated surfaces with a lower Sq and porosity density tended to yield higher film thickness. However, their influence on friction is complicated; lower roughness and porosity are preferred for lower wear, but certain levels of small roughness and surface pores may help to reduce boundary lubrication friction when compared with the frictional behaviors of porosity-free surfaces and those with higher roughness and higher porosity.

Friction and Wear Behaviors of CAPVD TiAlN Coating

2013 ◽  
Vol 645 ◽  
pp. 101-104
Author(s):  
Ai Hua Liu ◽  
Ze Shen Liu ◽  
Peng Zhang
Keyword(s):  
High Speed ◽  
Friction And Wear ◽  
Vapour Deposition ◽  
Test System ◽  
Test Results ◽  
Wear Properties ◽  
Tialn Coating ◽  
Cathodic Arc ◽  
Wear Tests ◽  
Ball On Disc

The paper reports friction and wear study of TiAlN coating at different speeds and loads. The coating was deposited on YG6 (WC+6 wt.% Co) 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 smaller as speeds and loads increased. TiAlN coating showed excellent anti-wear properties at high speed and high load, and was more suitable for these similar working conditions.

Dry sliding friction and wear behavior of self-lubricating wollastonite filled polycarbonate composites

2015 ◽  
Vol 67 (1) ◽  
pp. 22-29 ◽  
Author(s):  
Akin Akinci
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Xrd Analysis ◽  
Dry Sliding ◽  
Wear Performance ◽  
Content Type ◽  
Wear Rates ◽  
Wear Tests

Purpose – The purpose of this paper is to investigate the friction and wear performance of pure polycarbonate (PC) and 5-30 per cent wollastonite-filled (by weight) PC were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under the loads of 5-20 N and at the sliding speeds of 0.5-1.5 m/s. Design/methodology/approach – The microstructures of the wollastonite, pure PC and composites were examined by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analysis. The friction and wear tests were realized using a pin-on-disk arrangement against the hardened AISI 4140 steel. Findings – The result of this study indicated that the coefficients of friction wear rate of the materials were significantly influenced by an increase in wollastonite content. The friction coefficient of the PC was getting decreased from 0.457 to 0.198 with an increase in wollastonite content, depending on applied loads and sliding speeds. On the other hand, the results showed that the wear rates of pure PC and wollastonite-filled PCs decreased with an increase in loads. The wear rate of the PC decreased from 1.2 × 10−6 to 8.7 × 10−6 mm3/m with an increase in wollastonite content, depending on applied loads. Originality/value – There are many reports which deal with the friction and wear performance of the polymers and polymer composites. However, the effect of wollastonite effect on tribological performance of PC has up to now not been extensively researched.

Tribological Performance of Pulse Electroplated Ni-P/BN(h) Composite Coatings

2011 ◽  
Vol 103 ◽  
pp. 504-508 ◽  
Author(s):  
Cheng Zhang Peng ◽  
Ling Ling Zhu ◽  
Si Wen Tang
Keyword(s):  
Electron Microscope ◽  
Friction And Wear ◽  
Composite Coatings ◽  
Tribological Performance ◽  
Dry Sliding ◽  
Wear Properties ◽  
Plating Bath ◽  
Pulse Electroplating ◽  
Friction And Wear Properties ◽  
Scanning Electron

The Ni-P/ BN(h) composite coatings were prepared by pulse electroplating. The friction and wear properties of the composite coatings were investigated by using friction and wear tester under dry sliding condition, the worn surfaces morphology of the composite coatings were observed by scanning electron microscope (SEM).The results show that the wear rate and friction coefficient of the composite coating against 45 steel decrease with the increase of BN(h) content in plating bath, the wear mechanism is mild abrasion.

scholarly journals The Influence of Ball Burnishing on Friction in Lubricated Sliding

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5027
Author(s):  
Slawomir Swirad ◽  
Pawel Pawlus
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
White Light ◽  
Frictional Resistance ◽  
Friction Reduction ◽  
Ball Burnishing ◽  
Surface Topographies ◽  
Disc Configuration ◽  
Scanning Electron ◽  
Ball On Disc

Ball burnishing treatment, using the Ecoroll system, of steel samples was conducted. In the experiment, the burnishing pressure was changed. After the treatments, measurements of the surface topographies of disc samples were conducted using a white light interferometer Talysurf CCI Lite. Tribological tests were carried out in a ball-on-disc configuration. After these tests, measurements of surface topographies of disc samples were repeated. Worn surfaces were also analyzed with a scanning electron microscope. It was found that as the result of burnishing, surface topography height of tested samples decreased. Ball burnishing led to a reduction in the frictional resistance. The highest friction reduction of more than 40% was achieved with a burnishing pressure of 20 MPa.

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