Investigation of the tribological properties of antifrictional aluminum alloys using sclerometry

Sachek, B. Ya.; Mezrin, A. M.; Muravyеva, T. I.; Stolyarova, O. O.; Zagorskiy, D. L.; Белов, Н. А.

doi:10.3103/s1068366615020142

Cited by 18 publications

(5 citation statements)

References 2 publications

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“…Material of the ring (counterbody, roller) is Steel 45 and materials of the block (shoe) are experimental alloys under study. This contact pair was studied according to the previously developed method (Sachek et al, 2015). For testing with lubrication, the counterbody was partially immersed in the lubricating medium so during rotation the lubricant was captured by the counterbody and drawn into the contact zone.…”

Section: Tribological Testsmentioning

confidence: 99%

Tribological Tests Effect on Changes in the Surface Layers of Iron-Containing Antifrictional Aluminum Alloys

et al. 2019

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Antifrictional properties and surface parameters of Al-Si-Cu-Sn-Pb alloys have been investigated. The effect of iron addition (∼1%) on the structure and tribological properties of aluminum alloy samples has been studied. Tribological properties were explored using the "shoe-roller" scheme with step-by-step pressure changes. The investigations were carried out both in and without a lubricant. The SEM-(with elemental analysis) and SPM-microscopy methods were applied to study sample surface and under-surface layers of the samples at the transversal sections. After tribological tests have been carried out, the topography of both surface and under-surface layers at the transversal sections has been studied. During the tests without lubrication solid particles, presumably, oxides were formed. The particles increase the surface destruction, thus, doing their part of an abrasive and contributing to (scuffing) score. After testing in the lubricant particles containing silicon and copper and having a rounded shape were also formed. These particles remain on the surface and are rolled in the lubricant. They creating a kind of a "protective cover" contributing to the contact pair stable operation. The under-surface layer 50-100 µm thick formation was found at the sections after tribological tests without lubrication. The samples sections were prepared after testing with lubrication. The study of the samples sections demonstrated the formation of the under-surface layer with thickness 30-40 µm. The elements redistribution in these layers was shown. After the tribological tests were carried out, the counterbodies (rollers) were also explored. The SPM method has been shown the film formed on the surface is uneven in thickness after tests without lubrication. This leads to the macrorelief development during friction and can lead to (scuffing) score. On the contrary, after tests in lubricant the secondary structures film formed is distributed on the surface as a thin uniform layer. This film has the protective properties. It was shown that alloys containing iron (up to 1%) have good tribological characteristics when tested both in and without the lubricant. Thus, they can be used as antifrictional materials.

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Section: Tribological Testsmentioning

confidence: 99%

Tribological Tests Effect on Changes in the Surface Layers of Iron-Containing Antifrictional Aluminum Alloys

et al. 2019

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“…Трибологические испытания проводили на трибометре Т-05, моделирующем работу узла трения по схеме «колодка-ролик» (материал ролика -Сталь 45), с пошаговым изменением давления до 2 МПа [15]. Испытывали образцы в условиях без смазки с целью изучения поведения сплава при возможных экстремальных режимах эксплуатации (пуск-остановка, ударные нагрузки).…”

Section: испытанияunclassified

“…Трибологические испытания в условиях трения без смазки позволили получить аналитические выражения для зависимости интенсивности изнашивания от давления в виде I = f (P) [15,19] (где P -давление):…”

Section: исследование сплава эас после трибологических испытанийunclassified

The study of antifriction aluminum alloys containing iron, before and after tribological tests

Shcherbakova¹,

Muravyеva²,

Zagorskiy³

2018

LoM

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Experimental aluminum alloys with the addition of iron, which model the materials obtained with the addition of recyclables, were investigated. The use of the recyclable (silumin waste, production waste, remelting of canned scrap, etc.) seems to be promising for the national economy. In the work, the alloy of the Al-6 % Sn-5 % Si-4 % Cu (mass. %) system was used as a base, to which iron (1 %) and other elements (bismuth, lead, manganese) were added. The samples under investigation were subjected to heating up to 500°C and cooling in various regimes. It was shown that the best results were achieved with cooling in water: the phases were spheroidized and properties were improved. Complex method of microscopy, including optical, electronic (with X-ray spectral microanalysis), and probe microscopy was used, in order to study alloys before and after tribological tests. An investigation of the initial structure of the samples showed that the combined addition of iron with manganese (0.5 %) led to the formation of favorable skeletal phases. The tribological tests without lubrication which modeled the extreme conditions of operation were carried out. These experiments showed that the investigated alloy had an increased wear resistance, which could be associated with the formation of skeletal phases. After tribological tests, significant changes in the structure and phase components at the surface and in the near-surface layer were observed. For the study of this layer, an oblique cut was made, on which near-surface area with a thickness of 50-100 μm was detected.

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“…Normally, tin and lead are the main alloying components for aluminum antifriction alloys [15][16][17][18][19][20][21][22][23][24]. Particularly, Al-20Sn-1Cu alloy is acknowledged to be a basic alloy for the development of new antifriction materials due to its good tribological behavior.…”

Section: Introductionmentioning

confidence: 99%

“…To get reasonable results the test methods should be as close as possible to the actual operating conditions. In this regard, sclerometry provides rather limited information about the real tribological properties of the material, since the conditions for the formation of secondary structures are completely different from the real ones [21,48].…”

Section: Introductionmentioning

confidence: 99%

Tribochemical Interaction of Multicomponent Aluminum Alloys During Sliding Friction with Steel

et al. 2020

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In this work, aluminum multicomponent alloys were studied after friction with steel in a mixed lubrication regime. The resulting secondary structures on the friction surface were investigated by scanning electron microscopy (SEM), energy dispersive analysis (EDX), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction analysis (XRD). In addition to the mass transfer of steel counterbody particles, phase transformations and new chemical compounds formed as a result of interaction with the lubricant were revealed. The release of elements, mainly magnesium and to a lesser extent zinc, from a solid solution of aluminum alloy was also observed, which indicates the occurrence of a non-spontaneous reaction with a negative entropy production.

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Investigation of the tribological properties of antifrictional aluminum alloys using sclerometry

Cited by 18 publications

References 2 publications

Tribological Tests Effect on Changes in the Surface Layers of Iron-Containing Antifrictional Aluminum Alloys

Tribological Tests Effect on Changes in the Surface Layers of Iron-Containing Antifrictional Aluminum Alloys

The study of antifriction aluminum alloys containing iron, before and after tribological tests

Tribochemical Interaction of Multicomponent Aluminum Alloys During Sliding Friction with Steel

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