Bearing Materials

Pfestorf, Harald; Weiß, Franz; Matucha, Karl Heinz; Wincierz, P.

doi:10.1002/14356007.a03_399

Cited by 2 publications

(2 citation statements)

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“…A plain counterpart is used for the RoD tests, whereby the sliding surfaces are parallel and hence no hydrodynamic load-bearing effect of the lubricant is assumed and the system is expected to operate under boundary lubrication conditions. The tested bearing materials usually come as multi-layer composites, wherein each individual layer caters to a particular tribological need [11][12][13][14]. The investigated tribomaterials are AlSn20Cu and AlSn40 lining materials with hard aluminium matrix and soft tin inclusions, which improves the emergency running properties and, a white metal lining material, SnSb7.5Cu3.5, consisting of soft tin matrix with hard particles.…”

Section: Introductionmentioning

confidence: 99%

Describing different operating regimes of journal-bearing materials by pressure velocity diagrams derived from ring-on-disc model testing

Grün

Gódor

Gärtner

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part J:

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The loading capacity of metallic journal-bearing materials is investigated in this study under lubricated conditions using a ring-on-disc test configuration. The materials investigated are AlSn20Cu, AlSn40, SnSb7.5Cu3.5, PbSn18Cu2, and AlSn20Cu-Sputter, mated against polished steel counterparts. The loading capacity for different sliding speeds ranging from 0.14 to 2.82 m/s was determined using seizure test procedure. Microscopic analysis of the tested specimen was carried out and the load limits were plotted in pv-diagrams. The results show that for tribomaterials with a load-bearing matrix, as in AlSn-based materials, an increase in the content of soft phase improves fault tolerance. It also increases the loading capacity at low speeds, where adhesion effects dominate. Materials composed of a soft matrix such as Sn-or Pb-based material possess excellent sliding performance but fail due to thermo-mechanical breakdown.

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Section: Introductionmentioning

confidence: 99%

Describing different operating regimes of journal-bearing materials by pressure velocity diagrams derived from ring-on-disc model testing

Grün

Gódor

Gärtner

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Journal bearing materials are usually of multi-phase composition to achieve numerous demands [1][2][3][4][5][6][7][8][9]. An optimization of journal bearing materials requires an in-depth knowledge of the processes taking place in the material during stable operation and subsequent breakdown.…”

Section: Introductionmentioning

confidence: 99%

Fundamentals of optimizing aluminium-based journal bearing materials

Grün

Gódor

Eichlseder

2009

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this article, a test methodology of model scale is used to visualize the processes taking place during operation and subsequent breakdown in the boundary layer of journal bearing materials. The investigated materials are alloys of aluminium (Al99.6, AlSn20Cu, AlSn40) and tin (SnSb7.5Cu3.5). The utilized test configuration is based on a ring-on-disc system. The employed seizure test procedure was designed in previous studies. The tribometric results clearly show differences in the tribological behaviour between the materials. A series of tests are carried out to explain the observed differences. The frictional surfaces and microsections are observed using microscopy and microindentation. Pure aluminium is characterized both by a potentially low coefficient of friction and an unforgiving overload behaviour. This is due to the fact that components based on pure aluminium tend to lose system stability spontaneously. As more of the soft-phase Sn is added to the matrix, the emergency running properties improve. The system behaves less erratically and the overload behaviour improves. However, the mechanical strength and the wear resistance drop. Tribological functional models summarize the results of tribometrics and damage analysis. These models are the key to further optimization of the materials.

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Bearing Materials

Abstract: The article contains sections titled: 1. Introduction 2. Rolling‐Element Bearings ‐ Materials … Show more

Cited by 2 publications

References 5 publications

Describing different operating regimes of journal-bearing materials by pressure velocity diagrams derived from ring-on-disc model testing

Describing different operating regimes of journal-bearing materials by pressure velocity diagrams derived from ring-on-disc model testing

Fundamentals of optimizing aluminium-based journal bearing materials

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