Studies on the Tribological Properties and Structure of Antifrictional Iron-Containing Aluminum Alloys

Sachek, B. Ya.; Mezrin, A. M.; Shcherbakova, O. O.; Muravyеva, T. I.; Zagorskiy, D. L.

doi:10.3103/s1068366618030108

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…It is known that usually in an aluminum alloy with iron a "needle-like" phase is formed, which causes embrittlement of the alloy. In this case, the addition of manganese neutralizes the harmful effects of iron and promotes the formation of the phase of the "skeleton" form, which does not impair the properties of the alloy (Sachek et al, 2018). It was also revealed that heat treatment does not affect this phase.…”

Section: Examination Of the Samples Structurementioning

confidence: 91%

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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: Examination Of the Samples Structurementioning

confidence: 91%

“…To neutralize this effect, manganese is added to aluminum alloys. Alloys of similar compositions were studied by the authors in previous works (Sachek et al, 2018), in which it was shown that the addition of iron (up to 1%, together with manganese) does not lead to a noticeable degradation of the tribological properties of the alloys.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…Или технология микродугового оксидирования с NaAlO2, что также снижает износ на порядок [2]. Сравнение [3] алюминиевого сплава состава Al-6% Sn-5% Si-4% Cu-2% Pb-2% Bi и аналогичного сплава с 1% содержанием железа показало повышение твердости последнего и, как следствие, его несущей способности, но это несколько ухудшает его антифрикционные свойства. Однако, несмотря на относительно высокий коэффициент трения, этот сплав сохраняет свою эффективность при сухом трении до 3,2 МПа, тогда как тот же сплав, но без железа, способен работать лишь до 0,5 МПа.…”

Section: институт физики прочности и материаловедения со ран томскunclassified

Mechanical Properties of Amg5 Alloy After Multi-Pass Friction Mixing Treatment With the Additation of Iron Powder

Knyazhev¹,

Kalashnikova²,

Чумаевский³

2022

Physical Mesomechanics of Materials. Physical Principles of Multi-Layer Structure Forming and Mechanisms of Non-Linear Behavior

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“…Today, we have a wide range of aluminum-based low-friction materials, the high level of tribotechnical properties of which is achieved with the addition of tin, lead, silicon, etc. Thus, Sachek et al [9] showed that the Al-Si (5%)-Cu (4%)-Sn (6%)-Pb (2%) alloy has tribotechnical properties close to BrOTsT 4-4-17 bronze. At the same time, additional alloying of the alloy with iron (Fẽ 1%) provides an increase in the tribotechnical properties up to the level of the antifriction alloy AO3-7.…”

Section: Introductionmentioning

confidence: 99%

Creation of AlSi12 Alloy Coating by Centrifugal Induction Surfacing with the Addition of Low-Melting Metals

et al. 2021

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This paper investigates the structure and mechanical characteristics of a coating based on an AlSi12 alloy, obtained by centrifugal induction surfacing as an alternative to a bronze sliding bearing. To provide for the adhesion of an aluminum layer to the inner surface of a steel bearing housing, a sublayer of low-melting metals was formed, while the formation of the main layer and the sublayer was done in a single processing cycle. The low-melting metals had higher density, which ensured that the sublayer was created at the interface with the steel bearing housing under the action of centrifugal forces. It is shown that the low-melting sublayer forms a strong bond both with the aluminum alloy and with the steel base. Lead and tin are used as low-melting additives. It has been established that lead or tin used in a sublayer are indirectly involved in the structural formation of boundary layers of steel and aluminum claddings, acting as a medium for diffuse mass transfer. Thus, lead is not included in the composition of the main coating and does not change the chemical composition of the aluminum layer. After the addition of tin, the aluminum develops a dendritic structure, with tin captured in the interdendritic space. In this case, the deposited layer is saturated with iron with the formation of intermetallic (Fe, Al, Si) compounds, both at the interface and in the coating volume. This paper offers an explanation of the mechanism through which Pb and Sn act on the structure formation of the coating, and on the boundary layer of the steel bearing housing. Tribological tests have shown that the resulting materials are a promising option for plain bearings and highly competitive with the CuSn10P bronze.

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Studies on the Tribological Properties and Structure of Antifrictional Iron-Containing Aluminum Alloys

Cited by 13 publications

References 5 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

Mechanical Properties of Amg5 Alloy After Multi-Pass Friction Mixing Treatment With the Additation of Iron Powder

Creation of AlSi12 Alloy Coating by Centrifugal Induction Surfacing with the Addition of Low-Melting Metals

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