Frictional behavior of non-equilibrium Cu-Pb alloys

Buchanan, Vernon E.; Molian, Pal; Sudarshan, T. S.; Akers, A.

doi:10.1016/0043-1648(91)90066-4

Cited by 53 publications

(8 citation statements)

References 11 publications

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“…Available information indicates that although the sliding wear behavior of the leaded-tin and aluminum bronzes and zinc-based alloys has been studied to some extent, [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] yet the role of their microstructural characteristics on the sliding wear response of the alloys has been investigated to a limited extent [8,9,11,12,[15][16][17][18][19][20] in spite of their great significance.…”

Section: Introductionmentioning

confidence: 99%

Dry sliding wear response of some bearing alloys as influenced by the nature of microconstituents and sliding conditions

Prasad

1997

Metall Mater Trans A

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An attempt has been made in this study to examine the dry sliding wear response of a leaded-tin bronze, an aluminum bronze, and a conventional zinc-based alloy under varying applied pressure and speed conditions. Different characteristics of the microconstituents of the alloys have been correlated with that of their wear behavior. The study clearly indicates that the influence of the microstructural features greatly changes with the sliding conditions. It also has been observed that in order to attain good wear characteristics, a material should comprise an optimum level of lubricating, load bearing and ductile microconstituents, and, above all, thermal stability. Room temperature properties in fact play rather a secondary role in this context.

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Section: Introductionmentioning

confidence: 99%

Dry sliding wear response of some bearing alloys as influenced by the nature of microconstituents and sliding conditions

Prasad

1997

Metall Mater Trans A

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“…This makes it necessary to elemental lead, helps to maintain lubrication. [2][3][4][5][6][7][8] characterize the tribological behavior of the centrifugally Due to its harmful effects, restrictions have been imposed cast copper-graphite composites, which are in contact with on the use of lead. This has prompted researchers to find a standard shaft material like 1045 steel.…”

Section: Introductionmentioning

confidence: 99%

Friction and wear behavior of a centrifugally cast lead-free copper alloy containing graphite particles

Kestursatya

Kim²,

Rohatgi

2001

Metall Mater Trans A

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The tribological properties of a centrifugally cast lead-free copper alloy (C90300), containing an average of 13 vol pct graphite particles (5 m), have been studied. Friction tests were carried out at three different loads of 44, 88, and 176 N using a pin-on-disk testing method for the base copper alloy and the copper-graphite composite against a 1045 steel disk counterface. The friction coefficient, temperature rise, and weight loss of the pin and disk were measured. To understand the wear mechanism, the wear debris and the surfaces of the pin and the disk were analyzed before and after the tests, using scanning electron microscope (SEM) and energy-dispersive X-ray (EDX) analysis. The friction coefficient of the copper-graphite pins was lower than that of the base-alloy pins for all applied loads, which was attributed to the presence of the graphite in the matrix. It was also observed that the presence of graphite in the matrix reduces the transfer of iron from the counterface to the pins, but enhances the transfer of materials from the pins to the counterface. The temperature rise in the counterface running against the base-alloy pins was larger than the temperature rise in the counterface running against the copper-graphite pins, both tested under similar conditions. In addition, the effect of element transfer on the friction coefficient, variations in the weight of the pins and the counterface, as well as the surface roughness, are attributed to the formation of a graphitic tribolayer on the surface of the copper-graphite pins. An isostrain model predicting the friction coefficient of the composites is proposed, which agrees well with the measurements in the present article as well as with measurements made by other investigators. [10]

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“…It indicates that the Tribo-elements should have appropriate friction and wear properties. In this respect, lead can be used as a solid lubricant which reduces friction between sliding surfaces significantly (Buchanan et al, 1991). Cu-Pb alloys can also be used for the materials of bearing because of their low coefficient of friction and relatively high loads-bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

THEORETICAL STUDY OF THERMODYNAMIC PROPERTIES OF Cu-Pb LIQUID ALLOYS AT DIFFERENT TEMPERATURE BY OPTIMIZATION METHOD

Shrestha

Singh

Jha

et al. 2017

J. Inst. Sci. Tech.

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A theoretical assessment on thermodynamic properties and concentration fluctuations of Cu-Pb liquid alloys at a specified temperature has been made by using the fitted values for size ratio ( ) and order energy parameter (W) of the alloys in Quasi-Lattice Theory where the combined effect of size ratio, entropic and enthalpic effect is considered. The order energy parameter (W) of the alloys is temperature dependent and its value at the required temperature has been determined by using the value of order energy parameter at the given temperature and temperature derivative of order energy parameter ( ). The values of W at different temperatures have been used to determine the free energy of mixing of the alloys at different temperatures which are then used for the optimization procedure in order to calculate the corresponding values of partial excess free energy of mixing and activity of the constituents involved in the alloy at different temperatures. These parameters have been used to predict the concentration fluctuations in long wavelength limit (S cc (0)) at different temperatures in the entire range of concentration.Keywords: Optimization procedure, Order energy parameter, Partial excess free energy of mixing, Size ratio, Liquid alloys. INTRODUCTIONInvestigations on the thermodynamic and structural properties of the alloys in liquid state are very essential to study the alloying behavior of the alloys. In order to achieve this goal, metal physicists, chemists and metallurgists have been working on several models (Flory, 1942;Alonso & March, 1982; Bhatia & Singh, 1989;Prasad et al., 1989;Young, 1992;Akinlade et al., 2000;Adhikari et al., 2010;Jha et al., 2014; Singh et al., 2014a Singh et al., , 2014b to understand the mixing properties of binary liquid alloys for preparing desired alloys. Copper being one of the most useful metals in our life because of its extraordinary corrosion resistance property is widely used in our daily-life mostly as a pure metal. Since it is a little soft metal, its hardness can be increased by making its alloys which have huge commercial applications because of their good electrical and mechanical properties along with high corrosion resistance. Though there

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Frictional behavior of non-equilibrium Cu-Pb alloys

Cited by 53 publications

References 11 publications

Dry sliding wear response of some bearing alloys as influenced by the nature of microconstituents and sliding conditions

Dry sliding wear response of some bearing alloys as influenced by the nature of microconstituents and sliding conditions

Friction and wear behavior of a centrifugally cast lead-free copper alloy containing graphite particles

THEORETICAL STUDY OF THERMODYNAMIC PROPERTIES OF Cu-Pb LIQUID ALLOYS AT DIFFERENT TEMPERATURE BY OPTIMIZATION METHOD

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