Materials and metallurgical aspects of piston ring scuffing — A literature survey

Scott, Douglas; Smith, A. I.; Tait, J; Tremain, G.R

doi:10.1016/0043-1648(75)90284-7

Cited by 39 publications

(12 citation statements)

References 47 publications

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“…A multilayer friction surface has been found in ferrous metals. Moreover, this surface is divided into several zones, one of these zones being the ªwhiteº layer, consisting of friction martensite as a result of high temperatures and shear stresses [3,4,6,7]. The conditions of crushing and dissolution of primary carbides, the distribution of alloying elements, the degree of c 6 a transformations, the character of the dislocation density change, etc., resulting from friction have been established [7 ± 10].…”

Section: Introductionmentioning

confidence: 99%

Structure of surface layers of metal matrix composites

Kalinichenko

Kezik

Bergmann

et al. 1999

Mat.-wiss. u. Werkstofftech.

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Section: Introductionmentioning

confidence: 99%

Structure of surface layers of metal matrix composites

Kalinichenko

Kezik

Bergmann

et al. 1999

Mat.-wiss. u. Werkstofftech.

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“…Many papers have reviewed the scuffing problem through the years, e.g. [4][5][6]. From these, it becomes clear that despite decades of research, there is no consensus among scientists, and the mechanisms of scuffing remain unclear.…”

Section: What Is Scuffing?mentioning

confidence: 99%

“…In early literature, hard, etch-resistant layers were observed on scuffed surfaces (called white layers because of their white appearance in the light optical microscope after etching). Scuffing was described as the formation and spalling of this layer [5,10,11]. Damage accumulation and plastic fatigue are other explanations for initiation of scuffing [4,12,13].…”

Section: What Is Scuffing?mentioning

confidence: 99%

Scuffing resistance testing of piston ring materials for marine two-stroke diesel engines and mapping of the operating mechanisms

Olander

Jacobson

2015

Wear

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PostprintThis is the accepted version of a paper published in Wear. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Olander, P., Jacobson, S. (2015) Scuffing resistance testing of piston ring materials for marine two-stroke diesel engines and mapping of the operating mechanisms. AbstractThe incentive is strong for optimising sliding materials to reduce the risk for scuffing. In this study, scuffing tests were performed aiming towards finding new piston ring materials for greener marine diesel engines and also towards understanding scuffing mechanisms better. The tested ring materials where grey iron, Stellite 6, plasma sprayed cermet and high velocity oxy fuel (HVOF) cermet (both cermets with the same compounds: Cr-carbide, Ni, Cr, Mo). The Stellite 6 and HVOF cermet performed somewhat better than the other two materials. Microscopic and spectroscopic studies of failed sample surfaces revealed several characteristic features. It was clear that different mechanisms are active simultaneously, at different parts of the samples. Based on these results, we propose a hypothesis for a scuffing process involving several stages with distinctive mechanisms. Further studies are needed to strengthen this hypothesis and to relate these findings to actual deterioration mechanisms in the engine.

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“…In early literature, hard, etch-resistant layers were observed on scuffed surfaces (called white layers because of the white appearance when etched and viewed in light optical microscope). Scuffing has been described as the formation and spalling of this layer [4,8].…”

Section: What Is Scuffing?mentioning

confidence: 99%

“…Several papers have reviewed scuffing [3][4][5] and many mechanisms of scuffing have been suggested. Some suggested mechanisms consider how the lubricating film is destroyed, for instance at a critical load or temperature [6].…”

Section: What Is Scuffing?mentioning

confidence: 99%

Testing scuffing resistance of materials for marine 2-stroke engines – Difficulties with lab scale testing of a complex phenomenon

Olander

Eskildsen²,

Fogh³

et al. 2015

Wear

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Optimising sliding materials of marine two-stroke diesel engine cylinders for reduced risk of scuffing is imperative because of the high costs associated with replacing the cylinder liner. But how can a complex and poorly understood phenomenon such as scuffing be tested? This study investigates the potential of material selection based on lab tests. Experience from ship operation is combined with analysis of lab scale scuffing tests to evaluate the possibilities of gaining applicable knowledge from scuffing testing. Two piston ring materials, a grey cast iron and a plasma sprayed cermet coating, both currently used in engines, were tested. Each of the materials was tested with two surface characters, achieved by run-in in a real engine and by fine grinding respectively. The ranking of the two materials proved to differ between the two surface characters. In the tests, scuffing could only be detected when all oil had become removed from the contact by being adsorbed by agglomerated wear debris and scraped away. This and other critical mechanisms behind scuffing in the tests are thoroughly discussed and compared to possible mechanisms taking place in the engine.

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Materials and metallurgical aspects of piston ring scuffing — A literature survey

Cited by 39 publications

References 47 publications

Structure of surface layers of metal matrix composites

Structure of surface layers of metal matrix composites

Scuffing resistance testing of piston ring materials for marine two-stroke diesel engines and mapping of the operating mechanisms

Testing scuffing resistance of materials for marine 2-stroke engines – Difficulties with lab scale testing of a complex phenomenon

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