Título

TRIBOLOGICAL RESPONSE OF SOFT MATERIALS SLIDING AGAINST HARD SURFACE TEXTURES AT VARIOUS NUMBERS OF CYCLES

TRIBOLOGICAL RESPONSE OF SOFT MATERIALS SLIDING AGAINST HARD SURFACE TEXTURES AT VARIOUS NUMBERS OF CYCLES

Autoria

Menezes, Pradeep Lancy; Kishore,; Kailas, Satish Vasu; Lovell, Michael Rhodes

Menezes, Pradeep Lancy

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Kishore,

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Kailas, Satish Vasu

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Lovell, Michael Rhodes

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DOI

10.5151/5463-5463-17155

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Resumo

In the present investigation, various kinds of textures were attained on the steel surfaces. Roughness of the textures was varied using different grits of emery papers or polishing powders. Pins made of pure Al, Al-4Mg alloy and pure Mg were then slid against prepared steel plate surfaces at various numbers of cycles using an inclined pin-on-plate sliding tester. Tests were conducted at a sliding velocity of 2 mm/s in ambient conditions under both dry and lubricated conditions. Normal loads increased up to 110 N during the test. 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. Surface roughness parameters of the plate were measured using an optical profilometer. In the experiments, it was observed that the coefficient of friction and formation of transfer layer under both dry and lubricated conditions during the first few cycles depend on the surface textures. Later on it is independent. The variation in the coefficient of friction under both dry and lubrication conditions is attributed to the self-organization of texture of the surfaces at the interface during sliding.

In the present investigation, various kinds of textures were attained on the steel surfaces. Roughness of the textures was varied using different grits of emery papers or polishing powders. Pins made of pure Al, Al-4Mg alloy and pure Mg were then slid against prepared steel plate surfaces at various numbers of cycles using an inclined pin-on-plate sliding tester. Tests were conducted at a sliding velocity of 2 mm/s in ambient conditions under both dry and lubricated conditions. Normal loads increased up to 110 N during the test. 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. Surface roughness parameters of the plate were measured using an optical profilometer. In the experiments, it was observed that the coefficient of friction and formation of transfer layer under both dry and lubricated conditions during the first few cycles depend on the surface textures. Later on it is independent. The variation in the coefficient of friction under both dry and lubrication conditions is attributed to the self-organization of texture of the surfaces at the interface during sliding.

Palavras-chave

Friction; Transfer layer; Surface texture; Self-organization.

Friction; Transfer layer; Surface texture; Self-organization.