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contact fatigue

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047968
EISBN: 978-1-62708-225-9
... loading when the bearing was not rotating or during installation. It was concluded that the bearings had failed in rolling-contact fatigue. The noise was eliminated and the preload was reduced to 30 lb by using a different spring washer as a corrective measure. Computers Loads (forces) Noise...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
...Abstract Abstract Rolling contact fatigue is responsible for a large number of industrial equipment failures. It is also one of the main failure modes of components subjected to rolling contact loading such as bearings, cams, and gears. To better understand such failures, an investigation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047964
EISBN: 978-1-62708-223-5
... to minimize retained austenite. Fatigue life of the bearing returned to normal with these changes. Selected Reference Selected Reference • Ahmed R. , Rolling Contact Fatigue , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 941 – 956 10.31399...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001500
EISBN: 978-1-62708-221-1
... operations. The primary failure was associated with the 4820H NiMo alloy steel pinion, and thus the gear was not examined. The mode of failure was rolling contact fatigue, and the cause of failure improper engineering design. The pattern of continual overload was restricted to a specific concentrated area...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001498
EISBN: 978-1-62708-218-1
... time.” Only the pinion head had been returned. The shaft portion had been torch-cut away. Chemical analysis along with the microstructure confirmed the specified material was SAE 43BV12 Ni-Cr-Mo alloy steel. The mode of failure was surface contact fatigue through the shear plane subsurface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047975
EISBN: 978-1-62708-225-9
... by contact fatigue mechanism (flaking) activated by the subsurface nonmetallic inclusions. Aircraft components Bearing races Flaking Transmissions (sutomotive) Bearing steel Fatigue fracture Rolling-contact wear The pilot of an aircraft reported illumination of the transmission oil-pressure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
...Abstract Abstract Rolling-contact fatigue (RCF) is a common failure mode in components subjected to rolling or rolling-sliding contact. This article provides a basic understanding of RCF and a broad overview of materials and manufacturing techniques commonly used in industry to improve...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001300
EISBN: 978-1-62708-215-0
...Abstract Abstract A bull gear from a coal pulverizer at a utility failed by rolling-contact fatigue as the result of continual overloading of the gear and a nonuniform, case-hardened surface of the gear teeth. The gear consisted of an AISI 4140 Cr-Mo steel gear ring that was shrunk fit...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
...Abstract Abstract A major cause of failure in components subjected to rolling or rolling/sliding contacts is contact fatigue. This article focuses on the rolling contact fatigue (RCF) performance and failure modes of overlay coatings such as those deposited by physical vapor deposition...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
...Abstract Abstract Rolling-contact fatigue (RCF) is a surface damage process due to the repeated application of stresses when the surfaces of two bodies roll on each other. This article briefly describes the various surface cracks caused by manufacturing processing faults or blunt impact loads...
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Published: 01 January 2002
Fig. 9 Pitting on helical gear teeth caused by contact fatigue. Pitting cracks frequently initiate subsurface. Source: Ref 12 More
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Published: 01 January 2002
Fig. 2 Stress risers initiating rolling-contact fatigue failure More
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Published: 01 January 2002
Fig. 4 Gear-tooth section. Rolling-contact fatigue. Crack origin subsurface. Progression was parallel to surface and inward away from surface. Not etched. 60× More
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Published: 01 January 2002
Fig. 5 Gear-tooth section. Rolling-contact fatigue. Crack origin subsurface. Progression was parallel with surface, inward, and finally to the surface to form a large pit or spall. Not etched. 60× More
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Published: 01 January 2002
Fig. 6 Gear-tooth section. Rolling-contact fatigue distinguished by subsurface shear parallel to surface. Note the undisturbed black oxides at the surface, indicating no surface-material movement. Not etched. 125× More
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Published: 01 January 2002
Fig. 9 Morphology of cracks leading to rolling-contact fatigue failure of PVD (TiN) coatings. (a) Crack parallel to the interface leading to spalled area for hard substrate (60 HRC) TiN coating. (b) Cracks parallel to the coating-substrate interface for hard substrate (60 HRC) TiN coating. (c More
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Published: 01 January 2002
Fig. 10 Rolling-contact fatigue failure modes of thermal spray cermet and ceramic coatings. Source: Ref 84 More
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Published: 01 January 2002
Fig. 23 Gear-tooth section. Rolling-contact fatigue. Crack origin subsurface. Progression was parallel to surface and inward away from surface. Not etched. 60× More
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Published: 01 January 2002
Fig. 24 Gear-tooth section. Rolling-contact fatigue. Crack origin subsurface. Progression was parallel with surface, inward, and finally to the surface to form a large pit or spall. Not etched. 60× More
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Published: 01 January 2002
Fig. 25 Gear-tooth section. Rolling-contact fatigue distinguished by subsurface shear parallel to surface. Note the undisturbed black oxides at the surface, indicating no surface-material movement. Not etched. 125× More