THE EFFECT OF SURFACE TEXTURE OF STEEL DISC
ON FRICTION AND FRETTING WEAR

Fretting tests were performed using an Optimol SRV5 tribotester in a ball-on-flat scheme. Balls from 100Cr6 steel of 60 HRC hardness and diameters of 10 mm co-acted with discs from 42CrMo4 steel of 47 HRC hardness under dry gross fretting conditions. Tests were performed at 300C and 25–35% relative humidity, and the number of cycles was 18000. During each test, the normal load was kept constant. Six sets of experiments were conducted. Discs had different surface textures as the result of machining. It was found that the lowest coefficients of friction were obtained for anisotropic surfaces when ball movements were perpendicular to main disc texture directions.

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The Effect of Surface Texture on Lubricated Fretting

Materials ◽

10.3390/ma13214886 ◽

2020 ◽

Vol 13 (21) ◽

pp. 4886

Author(s):

Agnieszka Lenart ◽

Pawel Pawlus ◽

Andrzej Dzierwa ◽

Slawomir Wos ◽

Rafal Reizer

Keyword(s):

Coefficient Of Friction ◽

Surface Texture ◽

Friction And Wear ◽

Normal Load ◽

Disc Surface ◽

The Coefficient Of Friction ◽

42Crmo4 Steel ◽

Ball Diameter ◽

Steel Balls ◽

Effect Of Surface

Experiments were conducted using an Optimol SRV5 tester in lubricated friction conditions. Steel balls from 100Cr6 material of 60 HRC hardness were placed in contact with 42CrMo4 steel discs of 47 HRC hardness and diversified surface textures. Tests were carried out at a 25–40% relative humidity. The ball diameter was 10 mm, the amplitude of oscillations was set to 0.1 mm, and the frequency was set to 80 Hz. Tests were performed at smaller (45 N) and higher (100 N) normal loads and at smaller (30 °C) and higher (90 °C) temperatures. During each test, the normal load and temperature were kept constant. We found that the disc surface texture had significant effects on the friction and wear under lubricated conditions. When a lower normal load was applied, the coefficient of friction and wear volumes were smaller for bigger disc surface heights. However, for a larger normal load a higher roughness corresponded to a larger coefficient of friction.

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The Effect of Disc Surface Topography on the Dry Gross Fretting Wear of an Equal-Hardness Steel Pair

Materials ◽

10.3390/ma12193250 ◽

2019 ◽

Vol 12 (19) ◽

pp. 3250 ◽

Cited By ~ 2

Author(s):

Lenart ◽

Pawlus ◽

Dzierwa

Keyword(s):

Relative Humidity ◽

Normal Load ◽

Fretting Wear ◽

Experimental Investigations ◽

Disc Surface ◽

Hardness Tests ◽

Total Wear ◽

The Coefficient Of Friction ◽

Constant Normal Load ◽

Number Of Cycles

Experimental investigations were carried out with an Optimol SRV5 tribological tester in a flat-on-sphere scheme. The balls co-acted with the discs in a gross sliding fretting regime. The balls and discs were made from the same steel with a very similar hardness. Tests were conducted at 25–35% relative humidity, 30 °C, and a constant normal load and number of cycles (18,000). The discs had different textures after various machining treatments. It was found that the total wear level of the tribological assembly was proportional to the disc surface amplitude. The influence of the disc roughness on the coefficient of friction was evident only for the smallest stroke of 0.1 mm, and the frequency of oscillation affected this dependency.

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An Experimental Study on the Effect of Surface Texture on Contact Stiffness Using Soft Material

MATEC Web of Conferences ◽

10.1051/matecconf/201821702005 ◽

2018 ◽

Vol 217 ◽

pp. 02005

Author(s):

Z. Fuadi

Keyword(s):

Surface Texture ◽

Normal Load ◽

Contact Stiffness ◽

Soft Material ◽

Contact Dynamics ◽

Real Contact Area ◽

Textured Surfaces ◽

Indentation Force ◽

Result Show ◽

Effect Of Surface

Contact interface is one of the most important factors in a mechanical contact because it is the place where friction, sound, and heat originate. It is therefore inevitable that modeling various phenomenon related to contact dynamics requires a proper representation of the contact interfaces. One of the methods in representing the behavior of two surfaces in contact is by using the parameter of contact stiffness. In this study, the effect of surface texture on contact stiffness is analyzed. the texture was used in order to reduce the randomness of surface roughness. the soft material was chosen to achieve a pure elastic contact thus preventing plastic deformation to the asperities. the analysis was conducted by using an indentation method employing a steel ball with a relatively small indentation force. the result show contact stiffness values of the textured surfaces were smaller than that of smooth surface. This is particularly observed at low normal load at which total deformation of the surface is relatively small compared to the asperities height. This decrease in the contact stiffness value of the textured surfaces can be related to the reduction in the real contact area.

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Effect of Surface Texture Molded by a Stainless Steel Mesh on the Invisalign Material Friction Coefficient

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1090.55 ◽

2015 ◽

Vol 1090 ◽

pp. 55-60

Author(s):

Yong Qing Cai ◽

Xiao Xiang Yang ◽

Bing Wei He

Keyword(s):

Stainless Steel ◽

Friction Coefficient ◽

Surface Texture ◽

Artificial Saliva ◽

Mold Surface ◽

Stainless Steel Mesh ◽

Surface Textures ◽

The Coefficient Of Friction ◽

Material Coefficient ◽

Effect Of Surface

Objective: This study aimed to evaluate the effect of surface texture mold by stainless steel (SS) mesh on Invisalign material friction coefficient. Materials and methods: Ten kinds of SS mesh were used to mold surface texture on Invisalign material. Experiments were conducted using a zirconia ball that slid against Invisalign material plates with different surface textures. In the experiments, the coefficients of friction under normal loads of 100, 200, and 300 g under dry and artificial saliva conditions were recorded. Results: The coefficient of friction was relative to the pore size and wire diameter of SS mesh. Conclusions: The Invisalign material coefficient can be effectively managed by the surface texture mold by SS mesh.

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A Clue to Understand Environmental Influence on Friction and Wear of Diamond-Like Nanocomposite Thin Film

Advances in Tribology ◽

10.1155/2013/352387 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 12

Author(s):

Sukhendu Jana ◽

Sayan Das ◽

Utpal Gangopadhyay ◽

Anup Mondal ◽

Prajit Ghosh

Keyword(s):

Relative Humidity ◽

Saline Solution ◽

Environmental Influence ◽

Normal Load ◽

Interpenetrating Network ◽

Wear Factor ◽

Wear And Friction ◽

The Coefficient Of Friction ◽

Effect Of Surface ◽

Ball On Disc

The wear and friction of diamond-like nanocomposite (DLN) film have been investigated in air with different relative humidity (RH), under deionized (DI) water and saline solution. The structure of the film has been characterized by Fourier transform infrared (FTIR), Raman spectroscopy, and scanning electron microscope (SEM). The result shows two interpenetrating network structure: a–C:H and a–Si:O, and they are interpenetrated by Si–C bonding. The tribological performance has been measured using ball-on-disc tribometer with tungsten carbide ball as counterbody at 10 N normal load. Results show that with increasing relative humidity (RH) from 35% to 80%, the coefficient of friction (COF) increases gradually from 0.005 to 0.074, whereas with increasing RH the wear factor decreases from9.8×10−8 mm3/Nm and attains a minimum value of2.7×10−8 mm3/Nm at 50% RH. With further increase of RH the wear factor increases again. Moreover, in DI water and especially in saline solution, both the COF and wear factor have been found to be significantly low. A clue has been interpreted to understand environmental dependency, considering the effect of surface dangling bonds, charge transfer, and chemical interactions.

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THE EFFECT OF WEAR DEBRIS REMOVAL ON THE FRETTING OF ROUGH SURFACES

Tribologia ◽

10.5604/01.3001.0010.5993 ◽

2017 ◽

pp. 47-54 ◽

Cited By ~ 1

Author(s):

Agnieszka LENART ◽

Paweł PAWLUS ◽

Andrzej DZIERWA ◽

Sławomir WOŚ

Keyword(s):

Normal Load ◽

Test Duration ◽

Wear Particles ◽

Tribological System ◽

Total Wear ◽

Debris Removal ◽

42Crmo4 Steel ◽

Rough Milling ◽

Number Of Cycles ◽

Ball On Disc

Experiments were conducted using an Optimol SRV5 ball-on-disc tribotester under dry gross slip fretting conditions. A sphere of 10 mm diameter from 100Cr6 steel of 64 HRC hardness contacted a disc made of 42CrMo4 steel of lower hardness (42 HRC). Normal load was set to 45 N, the test duration was 15 min, the number of cycles was 18000, and the frequency was 20 Hz. Tests were performed at 300C temperature, and displacement amplitude was set to 0.1 mm. Wear of the disc and ball was examined by a white light interferometer Talysurf CCI Lite. Wear particles were removed from a contact zone using blow-by with compressed air of constant pressures of 0.1, 0.3, and 0.5 MPa. Disc samples had different surface topography after polishing, vapour blasting, grinding, rough milling, and finishing milling. Due to debris removal, total wear of the analysed tribological system typically increased. Debris ejection led to a decrease in the wear of discs and an increase in the wear of balls.

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Factors Influencing Stick-Slip Motion: Effect of Hardness, Crystal Structure and Surface Texture

ASME/STLE 2011 Joint Tribology Conference ◽

10.1115/ijtc2011-61225 ◽

2011 ◽

Cited By ~ 4

Author(s):

Pradeep L. Menezes ◽

Kishore ◽

Satish V. Kailas ◽

Michael R. Lovell

Keyword(s):

Crystal Structure ◽

Coefficient Of Friction ◽

Surface Texture ◽

Normal Load ◽

Face Centered Cubic ◽

Stick Slip ◽

Surface Textures ◽

The Coefficient Of Friction ◽

Pure Metals ◽

Face Centered

In the present investigation, efforts were made to study the different frictional responses of materials with varying crystal structure and hardness during sliding against a relatively harder material of different surface textures and roughness. In the experiments, pins were made of pure metals and alloys with significantly different hardness values. Pure metals were selected based on different class of crystal structures, such as face centered cubic (FCC), body centered cubic (BCC), body centered tetragonal (BCT) and hexagonal close packed (HCP) structures. The surface textures with varying roughness were generated on the counterpart plate which was made of H-11 die steel. The experiments were conducted under dry and lubricated conditions using an inclined pin-on-plate sliding tester for various normal loads at ambient environment. In the experiments, it was found that the coefficient of friction is controlled by the surface texture of the harder mating surfaces. Further, two kinds of frictional response, namely steady-state and stick-slip, were observed during sliding. More specifically, stead-state frictional response was observed for the FCC metals, alloys and materials with higher hardness. Stick-slip frictional response was observed for the metals which have limited number of slip systems such as BCT and HCP. In addition, the stick-slip frictional response was dependent on the normal load, lubrication, hardness and surface texture of the counterpart material. However, for a given kind of surface texture, the roughness of the surface affects neither the average coefficient of friction nor the amplitude of stick-slip oscillation significantly.

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THE EFFECT OF SURFACE TEXTURING ON THE FRICTIONAL RESISTANCE OF STEEL-BRONZE ASSEMBLY IN LUBRICATED SLIDING

Tribologia ◽

10.5604/01.3001.0012.7013 ◽

2018 ◽

Vol 279 (3) ◽

pp. 69-76

Author(s):

Waldemar KOSZELA ◽

Lidia GAŁDA ◽

Andrzej DZIERWA ◽

Paweł PAWLUS ◽

Jarosław SĘP ◽

...

Keyword(s):

Friction Coefficient ◽

Normal Load ◽

Surface Texturing ◽

Frictional Resistance ◽

Mineral Oil ◽

Area Density ◽

42Crmo4 Steel ◽

Constant Normal Load ◽

Oil Pockets ◽

Effect Of Surface

The experiments were carried out using a block-on-ring tester. The block samples made from bronze CuSn10P of 138 HB hardness were burnished to obtain surfaces with circular oil pockets. Rings were made from 42CrMo4 steel of hardness 40 HRC. Friction tests were conducted at a constant normal load of 900 N. Tests were carried out at increasing sliding speeds of the range 0.08 – 0.82 m/s, starting from the lowest speed. The every speed was maintained for two minutes. The tested assembly was inserted in the reservoir of mineral oil L-AN 46. It was found that the dimple presence on block surface reduced the friction coefficient substantially compared to non-textured turned surfaces. The area density of dimples smaller than 15% (particularly 4.5% and 6%) was beneficial.

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