Tribological characteristics of antifriction alloys and mass transfer processes during operation of contact pairs in sliding bearings

Курбаткин, И. И.; Kudryashov, A. E.

doi:10.3103/s1068366611060080

Cited by 2 publications

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“…Tin is always present on the friction track surface during the stage of steady state friction of sintered Al-Sn alloys against steel without lubrication [16]. However, it was found in the composition of particles transferred on the friction track of the steel counterbody only when they reached a certain thickness [17]. The authors of this work suppose that an alloying of the transferred layer with elements of the steel counterbody and atoms of the surrounding atmosphere provides its high antifriction properties with an effect of solid lubricant.…”

Section: Introductionmentioning

confidence: 99%

“…The last statement is debatable, although high oxygen content is found on both coupled friction surfaces during the frictional interaction between the Al-Sn composite and steel [16][17][18]. However, it is known that oxygen is not dissolved in solid aluminum and tin, and, therefore, it can be only in the form of oxide films on the friction surface.…”

Section: Introductionmentioning

confidence: 99%

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Features of the Formation of Surface Structures under Dry Friction of Al-30Sn Composite against Steel

Русин¹,

Скоренцев²,

Krinitcyn³

2022

Coatings

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Features of the frictional interaction of a sintered Al-30Sn composite, which is used as a coating of bearing inserts, with steel counterbody in the absence of liquid lubricant were studied. The tribological tests were carried out according to the pin-on-disk scheme at room temperature. The friction coefficient μ of the friction pair is increased up to approximately 0.6 during the running-in process. Its growth stops when the stage of steady state friction begins, and then μ fluctuates around some relatively high and constant value. The study of the friction surfaces of the friction pair showed that the aforementioned increase in μ is due to the formation of a discrete transferred layer on the friction track surface and strain hardening of the subsurface layer of the Al-30Sn sample under the action of hard particles of the transferred layer. It was established that tin is transferred on the friction track surface mainly in a composition of wear particles, despite the high content of the solid lubricant in the investigated samples. The wear intensity of the samples subjected to processing by equal channel angular pressing with route A is much lower than that of the sintered (unprocessed) ones. The main wear mechanism of Al-30Sn composites under dry friction against steel is a delamination of the highly deformed subsurface aluminum grains along their interphase boundaries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%