Electrodeposited and Hardened Iron for Rolling Contact Fatigue Applications

1970 ◽  
Vol 92 (4) ◽  
pp. 557-564 ◽  
Author(s):  
R. K. Kepple ◽  
E. R. Mantel ◽  
O. J. Klingenmaier ◽  
R. L. Mattson
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Base Material ◽  
Rolling Contact ◽  
Rolling Element Bearing ◽  
Fatigue Properties ◽  
Case Hardening ◽  
Deposit Thickness ◽  
Fatigue Development ◽  
Bearing Materials

A new approach to the material cleanliness problem in rolling contact fatigue involving the use of hardened electrolytically deposited iron (or iron-nickel alloy) is discussed. It was demonstrated that the fatigue strength of surfaces prepared by case hardening electrodeposited iron or iron–4 percent nickel can be equivalent to the best of commercial rolling element bearing materials. Three base materials to which the plated material was applied were investigated. These covered a broad range of quality. The associated deposit thickness problem was investigated. Excellent fatigue properties were obtained if the deposit thickness was great enough to avoid fatigue development in the base material. With deposit thicknesses less than this amount, some improvement in fatigue life was obtained over that of the unplated base material.

Rolling-Contact Fatigue Studies With Four Tool Steels and a Crystallized Glass Ceramic

1961 ◽  
Vol 83 (4) ◽  
pp. 603-610 ◽  
Author(s):  
Erwin V. Zaretsky ◽  
William J. Anderson
Keyword(s):  
Fatigue Life ◽  
Glass Ceramic ◽  
Load Capacity ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Fatigue Properties ◽  
Continuous Increase ◽  
Bearing Materials ◽  
Steel Balls

The rolling-contact fatigue properties of crystallized glass ceramic balls together with AISI M-1, AISI M-50, Halmo, and WB-49 alloy steel balls tempered to various hardness levels were determined in the NASA spin rig and in the five-ball fatigue tester. A continuous increase in fatigue life and load capacity for each steel was observed with increased ball hardness. These results correlate with resistance to plastic deformation as measured with spherical specimens in rolling contact but do not correlate with elastic limit and yield strength measured for bar specimens. These bar specimens showed optimum values at intermediate hardness levels. Extremely low scatter in fatigue life for the ceramic balls indicate that the degree of structural homogeneity may be an important factor in life scatter of bearing materials.

scholarly journals Rolling Wear of Silicon Nitride Bearing Materials

1990 ◽  
Author(s):  
John W. Lucek
Keyword(s):  
Fatigue Life ◽  
Silicon Nitride ◽  
Failure Modes ◽  
Fatigue Testing ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Wear Performance ◽  
Wear Rates ◽  
Bearing Materials

Rolling-contact fatigue test methods were used to measure the wear performance of several silicon nitride materials. Sintered, hot pressed and hot isostatically pressed materials exhibited wear rates ranging over three orders of magnitude. Hot isostatically pressed materials had the lowest wear rates. Despite the disparity in wear performance, all materials tested had useful rolling-contact fatigue lives compared to steel. Fatigue life estimates, failure modes, and rolling wear performance for theses ceramics are compared to M-50 steel. This work highlights the rapid contact stress reductions that occur due to conformal wear in rolling-contact fatigue testing. Candidate bearing materials with unacceptably high wear rates may exhibit useful fatigue lives. Rolling contact bearing materials must possess useful wear and fatigue resistance. Proper performance screening of candidate bearing materials must describe the failure mode, wear rate, and the fatigue life. Guidelines for fatigue testing methods are proposed.

Rolling contact fatigue properties of Tuffritrided 0.2% C steel

Wear ◽  
1982 ◽  
Vol 77 (2) ◽  
pp. 237-245
Author(s):  
C.S. Nanjundaram ◽  
A.Ramamohana Rao
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Fatigue Properties

Effect of Repeated Quenching on Rolling Contact Fatigue Properties of JIS SUJ2 Bearing Steel

2016 ◽  
Vol 867 ◽  
pp. 60-65 ◽  
Author(s):  
Takayuki Kamiya ◽  
Yuuki Hashizume ◽  
Koshiro Mizobe ◽  
Katsuyuki Kida
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Bearing Steel ◽  
Rolling Contact ◽  
Fatigue Properties ◽  
Austenite Grain Size ◽  
Life Evaluation ◽  
Refinement Method ◽  
Prior Austenite Grain Size ◽  
Work Samples

One important method to improve the material properties is refinement of the prior austenite grain size. Repeated quenching is used as a grain refinement method. In the present work, samples of SUJ2 steel were furnace quenched once and thrice in order to investigate the effect of repeated quenching on rolling contact fatigue (RCF) strength. After the RCF tests, maicrostructure observations, Vickers hardness and retained austenite measurements, RCF life evaluation using the Weibull distribution were carried out. It was found that the dispersion of the life population was reduced by repeatedly quenching.

A Rolling Contact Fatigue Study of Hard Carbon Coated M-50 Steel

1992 ◽  
Vol 114 (2) ◽  
pp. 298-302 ◽  
Author(s):  
R. Wei ◽  
P. J. Wilbur ◽  
F. M. Kustas
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Base Material ◽  
Ion Source ◽  
Rolling Contact ◽  
Hard Carbon ◽  
Material Interfaces ◽  
Carbon Coatings ◽  
Carbon Coated ◽  
Stress Cycles

Hard carbon coatings with diamond-like properties were applied on AISI M-50 steel rods which were subjected to rolling contact fatigue (RCF) testing at a cyclic Hertzian stress level of 5.5 GPa. The coatings were produced using a single, broad beam ion source that directed 450 eV ions, derived from a methane discharge, onto the rods. Results from preliminary tests show that hard carbon coatings alter the fatigue failure characteristics of this material substantially. They caused the B50 lifetime to increase from 7.5 × 106 stress cycles for uncoated material to 13 × 106 but they also caused the B10 lifetime to decrease from 4 × 106 stress cycles for the uncoated material to less than 1 × 106. The coatings induced an order of magnitude increase in lifetime for some tests. Scanning electron microscopy, surface profilometry and microhardness tests were used to examine coating morphologies, investigate coating/base material interfaces and demonstrate hardness increases.

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