Frictional Behavior and Surface Damage in Cyclic Reciprocating Sliding Contact of Bearing Steel

2016 ◽  
Vol 2016 (0) ◽  
pp. GS-13
Author(s):  
Yuya TANAKA ◽  
Masahiro ENDO ◽  
Shigeaki MORIYAMA
Keyword(s):  
Surface Damage ◽  
Bearing Steel ◽  
Sliding Contact ◽  
Reciprocating Sliding ◽  
Frictional Behavior

Effect of Surface Textures in Highly Loaded Grease Lubricated Reciprocating Sliding Contacts

2005 ◽  
Author(s):  
S. Jacobson ◽  
E. Ka¨lvesten ◽  
U. Pettersson
Keyword(s):  
Steel Specimen ◽  
Surface Damage ◽  
Coated Steel ◽  
Sliding Contacts ◽  
Surface Textures ◽  
Optimum Treatment ◽  
Reciprocating Sliding ◽  
Highly Loaded ◽  
Reciprocating Sliding Contacts ◽  
Effect Of Surface

The influence of surface textures on the friction and surface damage of grease lubricated ball on flat fretting and short stroke reciprocating sliding has been investigated. The tested steel and DLC coated steel specimen were given eight different texture patterns and were compared with untextured ground and polished surfaces. The objective is to find optimum treatment of fretting surfaces to endure vibratory contact without suffering severe surface damage, by introducing lubricant supply between the surfaces within the area of contact. The friction evolution was continuously recorded. The friction and surface damage behaviour is discussed.

A Comparative Study on the Effect of Surface Topography by Hard Turning vs. Grinding on Frictional Performance at Dry and Lubricated Sliding Contact

2008 ◽  
Author(s):  
R. A. Waikar ◽  
Y. B. Guo
Keyword(s):  
Surface Topography ◽  
White Layer ◽  
Frictional Coefficient ◽  
Solid Lubricants ◽  
Bearing Steel ◽  
Tribological Performance ◽  
Sliding Contact ◽  
Frictional Performance ◽  
Dry Conditions ◽  
Frictional Coefficients

Machining-induced surface topography has a significant effect on tribological performance of machined components in sliding contact. However, the effect of different surface topography by turning versus grinding on tribological performance has received very little attention. In this study four types of surface topography by turning and grinding AISI 52100 bearing steel (62 HRc) were prepared and characterized to study its effect on friction and wear in sliding contact. Dry and lubricated reciprocating sliding wear tests with an on-line acoustic emission (AE) sensor were carried out using a ball-on-disk tribometer. The experimental results have shown that: (i) the turned surfaces, regardless of the presence of a white layer, yield smaller friction of coefficients in sliding along feed marks than across sliding at both dry and lubricated conditions. However, the opposite hold true for the ground surfaces; (ii) friction of coefficients (0.6∼0.8) at dry conditions is higher for both turned and ground fresh surfaces than their white layer counterparts regardless of sliding direction. At lubricated conditions, Friction of coefficients (0.1∼0.12) are smaller for the both turned and ground fresh surfaces than the white layer surfaces in along sliding, while it is equivalent in across sliding; (iii) the trends of acoustic amplitude amplitude are consistent with those of frictional coefficients for the turned or ground surfaces at dry conditions. Similar trends are also true for the turned surfaces at lubricated conditions, but not for the ground surfaces; and (iv) the wear debris on the track may act as solid lubricants to reduce the sliding frictional coefficient. Machining induced white layers leads to a better wear resistance than the fresh surfaces in either along or across sliding.

Experimental and Fracture Mechanics Study of the Pit Formation Mechanism Under Repeated Lubricated Rolling-Sliding Contact: Effects of Reversal of Rotation and Change of the Driving Roller

1997 ◽  
Vol 119 (4) ◽  
pp. 788-796 ◽  
Author(s):  
Y. Murakami ◽  
C. Sakae ◽  
K. Ichimaru ◽  
T. Morita
Keyword(s):  
Fatigue Crack ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Surface Damage ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Sliding Contact ◽  
Hydraulic Pressure ◽  
Pit Formation ◽  
Original Crack

Five rolling contact fatigue tests, Tests {1}–{5} have been conducted. In Tests {1}–{3}, when a fatigue crack was initiated on the surface of a follower, the test was halted. Then, in Test {1} the rotating direction was reversed. In Test {2} the follower and driver were interchanged, and in Test {3} the test was continued unchanged. In Test {3} the original crack grew to a pit. In Tests {1} and {2} the original crack immediately stopped propagating. In Tests {4} and {5}, mating with a harder roller, a softer roller was used as the follower in Test {4} and as the driver in Test {5}. A typical pit occurred in Test {4}. In Test {5}, surface damage substantially different from a typical pit was generated. Based on these experimental results, a 3-D crack analysis including the effect of frictional force on the contact surface and oil hydraulic pressure on crack surfaces, was conducted to elucidate the mechanisms of pit formation and surface damage in contact fatigue.

A Two-Disk Test Rig for Researching the Damage Behavior of Rolling/Sliding Contact Surfaces under Extreme Conditions

2011 ◽  
Vol 291-294 ◽  
pp. 1500-1505
Author(s):  
Bo Peng ◽  
Li Qin Wang ◽  
Shou Xiao Fan ◽  
De Zhi Zheng ◽  
Le Gu
Keyword(s):  
Surface Damage ◽  
Hydraulic Cylinder ◽  
Sliding Contact ◽  
Hertzian Contact ◽  
Variable Load ◽  
Extreme Conditions ◽  
Test Rig ◽  
Speed Up ◽  
Main Spindle ◽  
Disk Test

A two-disk test rig researching surface damage and ultimate performance of rolling-sliding tribo-parts in extreme conditions is designed. Variable speed (rolling speed up to 83.6m/s, sliding speed up to 16.4m/s) of the rolling/sliding contact are input by motor spindle and regulated with gear. Variable load (Hertzian contact up to 4GPa) is applied with hydraulic cylinder. High temperature (~+300°C) and cryogenic environment(liquid nitrogen) is implemented by changing the lubricant condition. Thermal-stress analysis with ANSYS shows that the temperature and stress of the tester body is reasonable. As the signals judging failure, such parameters as temperature and vibration of the supporting bearing, power consumption of the main spindle, temperature of the tribo-parts surface are monitored in real time. Kingview, PLC, VB and MATLAB software are employed in the online monitoring system to collect data automatically. Types of tribo-parts were tested in the test rig, getting their ultimate performance and the effect of each parameter on surface damage.

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