Mechanism of seizure of aluminium-silicon alloys dry sliding against steel

Reddy, A. Somi; Bai, Bo; Murthy, K. S. S.; Biswas, Sushanta

doi:10.1016/0043-1648(95)90182-5

Cited by 41 publications

(9 citation statements)

References 6 publications

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“…However, undoubtedly the onset of galling, scoring, scuffing, or seizing is accompanied by a dramatic change in friction force, wear rate, and surface topography and usually requires that the contact pressure exceeds some threshold value [3]. Seizure occurs in a lubricated contact when a critical temperature characteristic of the sliding couplelubricant combination is reached at the interface [2]. In general, seizure mechanisms are often considered to be dominated by plastic deformation or temperature [6].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Oil Pockets Shape and Distribution on Seizure Resistance in Lubricated Sliding

et al. 2009

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The results of experimental investigations on the effect of the oil pockets existence on seizure resistance of sliding elements are presented. Seizure tests were conducted with block-on-ring apparatus at increasing pressure. The stationary block (counter specimen) contacted the rotating steel ring (specimen). The tested assemblies were lubricated by oil L-AN 46, which was heated to 30°C before each experiment. The sliding was unidirectional. The block was a part of a bearing sleeve-hardened EN-GJS 400-15 cast iron with a hardness value of 50 HRC. The ring samples, 35 mm in diameter, were made from hardened 42CrMo4 steel of hardness 32 HRC. The friction force and temperature near the contact zone were measured during the tests. Some variants of specimen surfaces were created by burnishing technique. They were characterised by the oil pocket density, the holes depth, length, and width. The oil pockets existence of area density of 10% on the ring surface improved seizure resistance of the sliding pair steel-cast iron for speed of 0.27 m/s. The pit shape and orientation are very important, too.

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Section: Introductionmentioning

confidence: 99%

“…Generally, seizure is said to occur when the real area of contact approaches the apparent area of contact [2]. Terms used currently in tribology to denote catastrophic wear modes under different conditions include seizure, scuffing, scoring, galling, and gouging.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Oil Pockets Shape and Distribution on Seizure Resistance in Lubricated Sliding

et al. 2009

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“…The wear behaviour of surface-modified aluminium alloys is widely studied [4][5][6][7][8]. The artificially agehardened aluminium alloy, AA6063, showed better wear resistance compared to as-cast aluminium samples [4].…”

Section: Introductionmentioning

confidence: 99%

“…The wear rate of near-eutectic Al-Si alloy was found to depend on the sliding speed [6] and the wear mechanism was reported to change with sliding speed. Many researchers have also reported a significant effect of normal load on the wear rate [7]. Laser shock processing reduces the wear rate of 6061-T6 aluminium alloy due to the presence of compressive residual stresses [8].…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Wear Behaviour of Oil Jet Peened Aluminium Alloy, AA6063-T6

Prakash

Gnanamoorthy

Kamaraj

2010

Proceedings of the Institution of Mechanical Engineers, Part J:

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Oil jet peening makes use of high-pressure oil jet to impart compressive residual stresses on the surface of metallic materials in order to improve the surface properties. This article reports the dry sliding wear characteristics of oil jet peened aluminium alloy, AA6063-T6. The presence of compressive residual stress and high hardness improves the wear resistance of oil jet peened surfaces. Changes in the hardness, surface morphology, and residual stress distribution due to peening affect the tribological behaviour. The initial and steady-state coefficient of friction are less in the treated samples compared to untreated samples. The scanning electron microscope images of the worn surfaces reveal the dominant adhesive and mild abrasive form of wear.

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“…Accordingly the hypoeutectic pins seized and the 23 per cent silicon hypereutectic pins did not seize in the normal pressure range of 2-26 MPa (sliding speed = 0.8 m/s). In a subsequent paper (5) it was demonstrated that the surface shear stress (s) to hardness (p) ratio of a material increases with the subsurface temperature and when it reaches a value of about 0.2, bulk shear occurs and the material seizes. While these results, obtained under unidirectional sliding, provided a rationale for the industrial practice of using hypereutectic alloys for heavily loaded pistons (6) in automobile engines, for it to be of any practical use the results and conclusions of the unidirectional sliding study needs to be reviewed in the context of reciprocating sliding.…”

Section: Introductionmentioning

confidence: 99%

Wear and Seizure of Aluminium-Silicon Piston Alloys in Reciprocating Motion against Steel

Reddy

Murthy

Biswas

1995

Proceedings of the Institution of Mechanical Engineers, Part J:

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Aluminium-silicon alloy pins were dry slid in unidirectional and reciprocating sliding against steel counterjiies in a normal pressure range of 0.39-26 MPa and a sliding speed range of 0.6-1.8 m/s. Changing the mode of sliding from unidirectional to reciprocating as well as an increase in reciprocating speed were found to affect wear and seizure resistances adversely. Alloying additions of copper and magnesium to the base metal, on the other hand, were found to improve both of these properties. The temperature rise of the pin during sliding and the mechanical behaviour of the test alloys in compression in a temperature range of 25-300"C and a strain rate range of O.I-lOO/s were recorded and the data incorporated into a qualitative model to account for the wear and seizure behaoiour of the test materials.

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Mechanism of seizure of aluminium-silicon alloys dry sliding against steel

Cited by 41 publications

References 6 publications

The Effect of Oil Pockets Shape and Distribution on Seizure Resistance in Lubricated Sliding

The Effect of Oil Pockets Shape and Distribution on Seizure Resistance in Lubricated Sliding

Dry Sliding Wear Behaviour of Oil Jet Peened Aluminium Alloy, AA6063-T6

Wear and Seizure of Aluminium-Silicon Piston Alloys in Reciprocating Motion against Steel

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