Study of Friction and Transfer Layer Formation in Copper-Steel Tribo-System: Role of Surface Texture and Roughness Parameters

Surface texture influences friction during sliding. In the present investigation, experiments were conducted using an inclined pin-on-plate apparatus to study the tribological response of metals and polymers during sliding against various surface textures. In the experiments, metals (Pb and Sn) and polymers (PP and PVC) were used for the pin and hardened steel was used for the plate. Experiments were conducted under both dry and lubricated conditions in an ambient environment. Two surface parameters of the steel plates — roughness and texture — were varied in the experiments. Using scanning electron microscope images, the surfaces of both the plate and pin materials were examined to determine the transfer layer formation on the plate and the wear of the pins. Based on the experimental results, it was observed that the transfer layer formation and the coefficient of friction were controlled by the surface texture of the plates. Moreover, both polymers and metals exhibited similar frictional responses, but the metals had a significantly larger variation in friction with surface texture.

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The role of surface texture on friction and transfer layer formation during repeated sliding of Al–4Mg against steel

Wear ◽

10.1016/j.wear.2011.01.076 ◽

2011 ◽

Vol 271 (9-10) ◽

pp. 1785-1793 ◽

Cited By ~ 16

Author(s):

Pradeep L. Menezes ◽

Kishore ◽

Satish V. Kailas ◽

Michael R. Lovell

Keyword(s):

Surface Texture ◽

Layer Formation ◽

Transfer Layer

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Effect of surface roughness parameters and surface texture on friction and transfer layer formation in tin–steel tribo-system

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2008.01.003 ◽

2008 ◽

Vol 208 (1-3) ◽

pp. 372-382 ◽

Cited By ~ 43

Author(s):

Pradeep L. Menezes ◽

Kishore ◽

Satish V. Kailas

Keyword(s):

Surface Roughness ◽

Surface Texture ◽

Layer Formation ◽

Roughness Parameters ◽

Transfer Layer ◽

Surface Roughness Parameters ◽

Effect Of Surface

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Studies on Friction and Formation of Transfer Layer in HCP Metals

Volume 3: Design; Tribology; Education ◽

10.1115/esda2008-59011 ◽

2008 ◽

Author(s):

Pradeep L. Menezes ◽

Kishore ◽

Satish V. Kailas

Keyword(s):

Coefficient Of Friction ◽

Surface Texture ◽

Soft Materials ◽

Hard Material ◽

Layer Formation ◽

Ambient Conditions ◽

Transfer Layer ◽

Stick Slip ◽

Stick Slip Motion ◽

Slip Motion

Surface texture plays an important role as it predominantly controls the frictional behavior and transfer layer formation at the contacting surfaces. In the present investigation, basic studies were conducted using inclined pin-on-plate sliding tester to understand the role of surface texture of hard material on coefficient of friction and transfer layer formation when sliding against soft materials. HCP materials such as pure Mg and pure Zn were used as pins while 080 M40 steel was used as plate in the tests. Two surface parameters of steel plates — roughness and texture — were varied in the tests. Tests were conducted in ambient conditions under both dry and lubricated conditions. The morphologies of the worn surfaces of the pins and the formation of transfer layer on the counter surfaces were observed using a scanning electron microscope. It was observed for both the pin materials that the occurrence of stick-slip motion, the transfer layer formation and the value of coefficient of friction as well as its two components, namely, adhesion and plowing, depend primarily on surface texture. The effect of surface texture on coefficient of friction was attributed to the variation of plowing component of friction for different surfaces. Both the plowing component of friction and amplitude of stick-slip motion were highest for the surface texture that promotes plane strain conditions while these were lowest for the texture that favors plane stress conditions at the interface.

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