Microstructural evolution during scuffing of hardened 4340 steel—implication for scuffing mechanism

Ajayi, O. O.; Hersberger, J. G.; Zhang, J.; Yoon, Ho‐Geun; Fenske, G.R.

doi:10.1016/j.triboint.2004.08.011

Cited by 51 publications

(25 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Others focus on the break down of solid lubricating films, such as oxide layers, which occurs if the wear rate is higher than the rate of film formation [3]. Still others view poor lubrication just as a necessity for scuffing to be initiated and focus on the mechanisms of deformation occurring after lubrication has failed [7]. 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).…”

Section: What Is Scuffing?mentioning

confidence: 99%

“…Damage accumulation and plastic fatigue are other explanations for initiation of scuffing [3,10,11]. A later suggestion by Ajayi et al is that scuffing is explained by adiabatic shear instability [7]. According to this theory, scuffing occurs via adiabatic shear when the rate of thermal softening exceeds the rate of work hardening in the sliding contact.…”

Section: What Is Scuffing?mentioning

confidence: 99%

“…Configurations include pin-on-twin (one cylinder reciprocating on two) [15], ball-on-flat (reciprocating and rotating) [1,16], cylinder-on-plate (pivoting) [17], pin-ondisc/block-on-ring (rotating) [18,7]. Most test procedures include an increase in the severity of the sliding contacts, for example by increase of speed [1], load [16,7] or by starved lubrication [18]. Some procedures do not include any increase in severity [15,17].…”

Section: How Is Scuffing Simulated In Lab Scale?mentioning

confidence: 99%

“…Ayaji et al [1] tested scuffing resistance with fully immersed contacts, but performed their tests in diesel fuel oils, which are not as lubricious as the fully formulated cylinder oil used in the present study. Scuffing tests have also been performed using polyalphaolefin (PAO) [16,7], and hexadecane [1]. Qu et al…”

Section: Higher Friction Due To Higher Normal Forcesmentioning

confidence: 99%

See 3 more Smart Citations

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

View full text Add to dashboard Cite

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.

show abstract

Section: What Is Scuffing?mentioning

confidence: 99%

Section: What Is Scuffing?mentioning

confidence: 99%

Section: How Is Scuffing Simulated In Lab Scale?mentioning

confidence: 99%

Section: Higher Friction Due To Higher Normal Forcesmentioning

confidence: 99%

See 2 more Smart Citations

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

View full text Add to dashboard Cite

show abstract

“…Others still, view poor lubrication as a necessity for scuffing to be initiated, and focus their model on the mechanisms of deformation occurring after lubrication has failed [9]. 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).…”

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

View full text Add to dashboard Cite

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.

show abstract

Experimental investigation of wear characteristics on TiCN-coated AISI 410 steel

Vijayasarathi¹,

Ilaiyavel

Palimar

2016

Appl. Phys. A

View full text Add to dashboard Cite

Microstructural evolution during scuffing of hardened 4340 steel—implication for scuffing mechanism

Cited by 51 publications

References 7 publications

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

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

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

Experimental investigation of wear characteristics on TiCN-coated AISI 410 steel

Contact Info

Product

Resources

About