Discussion: “Rolling-Element Fatigue Life of AMS 5749 Corrosion Resistant, High Temperature Bearing Steel” (Parker, R. J., and Hodder, R. S., 1978, ASME J. Lubr. Technol., 100, pp. 226–232)

1978 ◽  
Vol 100 (2) ◽  
pp. 233-233
Author(s):  
R. Valori
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Bearing Steel ◽  
Corrosion Resistant ◽  
Rolling Element

scholarly journals Fatigue Life of High-Speed Ball Bearings With Silicon Nitride Balls

1975 ◽  
Vol 97 (3) ◽  
pp. 350-355 ◽  
Author(s):  
R. J. Parker ◽  
E. V. Zaretsky
Keyword(s):  
Fatigue Life ◽  
Silicon Nitride ◽  
High Speed ◽  
Bearing Steel ◽  
Rolling Element Bearing ◽  
Ball Bearings ◽  
Rolling Element ◽  
Low Mass ◽  
Element Bearing ◽  
Steel Balls

Hot-pressed silicon nitride was evaluated as a rolling-element bearing material. This material has a low specific gravity (41 percent that of bearing steel) and has a potential application as low mass balls for very high-speed ball bearings. The five-ball fatigue tester was used to test 12.7-mm- (0.500-in-) dia silicon nitride balls at maximum Hertz stresses ranging from 4.27 × 109 N/m2 (620,000 psi) to 6.21 × 109 N/m2 (900,000 psi) at a race temperature of 328K (130 deg F). The fatigue life of NC-132 hot-pressed silicon nitride was found to be equal to typical bearing steels and much greater than other ceramic or cermet materials at the same stress levels. A digital computer program was used to predict the fatigue life of 120-mm- bore angular-contact ball bearings containing either steel or silicon nitride balls. The analysis indicates that there is no improvement in the lives of bearings of the same geometry operating at DN values from 2 to 4 million where silicon nitride balls are used in place of steel balls.

scholarly journals Rolling-Element Fatigue Life of AMS 5749 Corrosion Resistant, High Temperature Bearing Steel

1978 ◽  
Vol 100 (2) ◽  
pp. 226-232 ◽  
Author(s):  
R. J. Parker ◽  
R. S. Hodder
Keyword(s):  
Fatigue Life ◽  
Retained Austenite ◽  
Melting Process ◽  
Bearing Steel ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Vacuum Arc ◽  
Vacuum Melting ◽  
Significant Difference ◽  
Rolling Element

The rolling-element fatigue lives of AMS 5749 and AISI M-50 were compared in tests run in the five-ball fatigue tester and the rolling-contact (RC) fatigue tester. The effects of double vacuum melting and retained austenite on the life of AMS 5749 were determined in five-ball fatigue tests. The double vacuum melting process consisted of induction vacuum melting followed by vacuum arc remelting (VIM-VAR). In the five-ball tests, VIM-VAR AMS 5749 gave lives at least six times that of VIM-VAR AISI M-50. Similar tests in the rolling-contact (RC) fatigue tester showed no significant difference in the lives of the two materials. The rolling-element fatigue life of VIM-VAR AMS 5749 was at least 14 times that of vacuum induction melted AMS 5749. A trend toward increased rolling-element fatigue life with decreased retained austenite is apparent, but the confidence that the all experimental differences are significant is not great. The highest level of retained austenite, 14.6 percent, is, however, significantly detrimental to rolling-element fatigue life, relative to the intermediate level of 11.1 percent.

WAUKESHA ALLOY 88

Alloy Digest ◽  
1993 ◽  
Vol 42 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Nickel Base

Abstract WAUKESHA METAL NO. 88 is a corrosion resistant nickel-base alloy compounded to run against stainless steel without galling or seizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Ni-84. Producer or source: Waukesha Foundry Company. Originally published July 1963, revised February 1993.

UNILOY 50Cr/50Ni

Alloy Digest ◽  
1969 ◽  
Vol 18 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Heat Treating ◽  
Oil Refinery ◽  
Corrosive Media ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Pulping Liquors

Abstract UNILOY 50Cr/50Nj is an improved corrosion-resistant, wrought alloy with outstanding resistance to a wide variety of corrosive media. It is recommended for oil refinery heaters, incinerator components, metallurgical heat treating furnace components and reactor vessels for treating pulping liquors. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cr-2. Producer or source: Universal Cyclops Steel Corporation.

BIRMABRIGHT B.B.5

Alloy Digest ◽  
1959 ◽  
Vol 8 (11) ◽  
Keyword(s):  
Compressive Strength ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Medium Strength ◽  
Resistant Medium

Abstract BIRMABRIGHT B.B.5 is a corrosion resistant, medium-strength magnesium-aluminum alloy in both the cast and wrought conditions. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Al-85. Producer or source: Birmabright Ltd.

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