Durability of plasma-sprayed Cr3C2-NiCr coatings under rolling contact conditions

2011 ◽  
Author(s):  
Xiancheng Zhang ◽  
Fuzhen Xuan ◽  
Shantung Tu ◽  
Binshi Xu ◽  
Yixiong Wu
Keyword(s):  
Rolling Contact ◽  
Contact Conditions ◽  
Plasma Sprayed

Incipient Slip and Frictional Creep of Tyred Systems

2008 ◽  
Author(s):  
Saverio Reina ◽  
Daniele Dini
Keyword(s):  
Systematic Study ◽  
Rolling Contact ◽  
Two Dimensional ◽  
Elastic Strip ◽  
Moving Loads ◽  
Load Case ◽  
Contact Conditions ◽  
Substrate Interface ◽  
Interfacial Behaviour ◽  
Local Slip

This research presents a systematic study of the interfacial behaviour of tyred systems. A simplified two-dimensional contact model of an elastic strip, shrink-fitted onto a wheel, and subjected to different rolling contact conditions, has been developed. This model enables us to characterise the behaviour at the strip/substrate interface caused by a quasi-static application of moving loads on the surface of the layer. The solution is compared to the stationary load case and regimes of local slip, full stick, separation and frictional creep are identified and mapped for a variety of loading conditions, materials and geometries.

Application of Selected Multiaxial High-Cycle Fatigue Criteria to Rolling Contact Problems

2013 ◽  
Vol 542 ◽  
pp. 157-170 ◽  
Author(s):  
Paweł Romanowicz
Keyword(s):  
High Cycle Fatigue ◽  
Rolling Contact Fatigue ◽  
Roller Bearing ◽  
Three Dimensional ◽  
Contact Fatigue ◽  
Contact Problems ◽  
Rolling Contact ◽  
Cycle Fatigue ◽  
Contact Conditions ◽  
Tractive Rolling

The risk of fatigue failure of elements working in rolling contact conditions (such as railway wheels, rolling bearings, etc.) is a significant issue with respect to safety and economy. In this case the complex and non-proportional stress state with pulsating three dimensional compression occurs. Therefore, the analysis of fatigue life of structures working in rolling contact conditions can be performed using recently proposed multiaxial high-cycle fatigue criteria. However, there is no hypothesis that could be universally accepted for calculations of fatigue strength. Furthermore, not all criteria proposed in literature for rolling contact fatigue (RCF) analysis can predict it. In the paper, the most popular criteria based on different theories are investigated in the application to RCF problem. Moreover, modification of the popular Dang Van hypothesis is proposed. The problem of free and tractive rolling contact fatigue is analysed on the example of a cylindrical crane wheel and spherical thrust roller bearing.

Rolling contact fatigue behavior of plasma-sprayed CrC–NiCr cermet coatings

Wear ◽  
2008 ◽  
Vol 265 (11-12) ◽  
pp. 1875-1883 ◽  
Author(s):  
X.C. Zhang ◽  
B.S. Xu ◽  
F.Z. Xuan ◽  
S.T. Tu ◽  
H.D. Wang ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Cermet Coatings ◽  
Plasma Sprayed

Self-Lubricating Composite Plasma Sprayed Coatings

1996 ◽  
Author(s):  
D. Niebuhr ◽  
M. Scholl ◽  
P. Clayton
Keyword(s):  
Plasma Spraying ◽  
Solid Lubricants ◽  
High Energy ◽  
Contact Conditions ◽  
Steel Coating ◽  
Contact Loads ◽  
Soft Metal ◽  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Abstract Composite self-lubricating coatings were developed using high-energy plasma spraying (HEPS). These coatings would be potentially used in high contact pressure rolling/sliding systems. The coatings are based on a steel coating deposited by high energy plasma spraying using wire feedstock. Solid lubricants such as graphite and soft metal were investigated. Twin roller rolling/sliding tests were performed at 5% and 35% creep and contact loads of 700 N to 1700 N on a 5 mm contact face. Reduced friction, compared to a steel coating-steel or 1080 wrought steel couple was observed under these rolling-sliding contact conditions.

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