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Book Chapter
Tribology and Wear of Bearing Steels
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006393
EISBN: 978-1-62708-192-4
... Abstract This article discusses the composition, properties and applications of bearing steels. It focuses on the typical wear modes that rolling-element bearings experience: contact fatigue wear, abrasive wear, adhesive wear, and corrosive wear. The article provides information on reliability...
Abstract
This article discusses the composition, properties and applications of bearing steels. It focuses on the typical wear modes that rolling-element bearings experience: contact fatigue wear, abrasive wear, adhesive wear, and corrosive wear. The article provides information on reliability factor and ABMA and ISO environmental factors.
Book Chapter
Friction and Wear of Cobalt-Base Alloys
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006390
EISBN: 978-1-62708-192-4
... that lists the nominal compositions and typical applications of cobalt-base alloys. It discusses the properties and relative performance of specific alloys when subjected to the more common types of wear. These include abrasive wear, high-temperature sliding wear, rolling-contact fatigue wear, and erosive...
Abstract
This article focuses on the tribological behavior of group 1, 2, and 3 cobalt-base alloys, namely, carbide-type wear-resistant alloys and laves-type wear-resistant alloys. The behavior includes hardness, yield strength and ductility, and fracture toughness. The article contains a table that lists the nominal compositions and typical applications of cobalt-base alloys. It discusses the properties and relative performance of specific alloys when subjected to the more common types of wear. These include abrasive wear, high-temperature sliding wear, rolling-contact fatigue wear, and erosive wear.
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
..., the article describes the background information about the shaft used for examination. Then, it focuses on various failures in shafts, namely bending fatigue, torsional fatigue, axial fatigue, contact fatigue, wear, brittle fracture, and ductile fracture. Further, the article discusses the effects...
Abstract
In addition to failures in shafts, this article discusses failures in connecting rods, which translate rotary motion to linear motion (and conversely), and in piston rods, which translate the action of fluid power to linear motion. It begins by discussing the origins of fracture. Next, the article describes the background information about the shaft used for examination. Then, it focuses on various failures in shafts, namely bending fatigue, torsional fatigue, axial fatigue, contact fatigue, wear, brittle fracture, and ductile fracture. Further, the article discusses the effects of distortion and corrosion on shafts. Finally, it discusses the types of stress raisers and the influence of changes in shaft diameter.
Book Chapter
Tribology and Wear of Tool Steels
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006417
EISBN: 978-1-62708-192-4
...-work tool steels. It describes four basic mechanisms of tool steel wear: abrasion, adhesion, corrosion, and contact fatigue wear. The article describes the factors to be considered in the selection of lubrication systems for tool steel applications. It also discusses the surface treatments for tool...
Abstract
Tool steels are carbon, alloy, and high-speed steels that can be hardened and tempered to high hardness and strength values. This article discusses the classifications of commonly used tool steels: water-hardening tool steels, shock-resisting tool steels, cold-work tool steels, and hot-work tool steels. It describes four basic mechanisms of tool steel wear: abrasion, adhesion, corrosion, and contact fatigue wear. The article describes the factors to be considered in the selection of lubrication systems for tool steel applications. It also discusses the surface treatments for tool steels: carburizing, nitriding, ion or plasma nitriding, oxidation, boriding, plating, chemical vapor deposition, and physical vapor deposition. The article describes the properties of high-speed tool steels. It summarizes the important attributes required of dies and the properties of the various materials that make them suitable for particular applications. The article concludes by providing information on abrasive wear and grindability of powder metallurgy steels.
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
.... Wear may occur by rolling-sliding or by surface fatigue (rolling-contact fatigue, or RCF), but eventually RCF begins, and lines of travel caused by micropitting may appear on bearing surfaces. Rolling lines of travel can progress to visible pitting and even spalling. When the mechanical action...
Abstract
This article considers the main characteristics of wear mechanisms and how they can be identified. Some identification examples are reported, with the warning that this task can be difficult because of the presence of disturbing factors such as contaminants or possible additional damage of the worn products after the tribological process. Then, the article describes some examples of wear processes, considering possible transitions and/or interactions of the mechanism of fretting wear, rolling-sliding wear, abrasive wear, and solid-particle erosion wear. The role of tribological parameters on the material response is presented using the wear map concept, which is very useful and informative in several respects. The article concludes with guidelines for the selection of suitable surface treatments to avoid wear failures.
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
... fatigue limits, and thus call for improved understanding of the RCF failure modes. Fig. 2 Stress risers initiating rolling-contact fatigue failure Four distinct failure modes have been established in rolling-contact bearings ( Ref 5 ). These classifications include wear-type failures...
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, chemical vapor deposition, and thermal spraying (TS). It provides a background to RCF in bearing steels in order to develop an understanding of failure modes in overlay coatings. The article describes the underpinning failure mechanisms of TiN and diamond-like carbon coatings. It presents an insight into the design considerations of coating-substrate material properties, coating thickness, and coating processes to combat RCF failure in TS coatings.
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
.... A brief discussion on coatings to improve surface-initiated fatigue and wear is included, due to the similarity to RCF and the increasing criticality of this failure mode. The article presents a working knowledge of Hertzian contact theory, describes the life prediction of rolling-element bearings...
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 component life. A brief discussion on coatings to improve surface-initiated fatigue and wear is included, due to the similarity to RCF and the increasing criticality of this failure mode. The article presents a working knowledge of Hertzian contact theory, describes the life prediction of rolling-element bearings, and provides information on physics and testing of rolling-contact fatigue. Processes commonly used to produce bearings for demanding applications are also covered.
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
... fatigue failure, the delamination failure, and the rolling-contact wear. ceramics delamination failure fatigue cracks propagation rolling contact fatigue test machines rolling-contact fatigue rolling-contact wear spalling fatigue failure surface cracks TECHNICAL CERAMICS used...
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 on ceramic balls surfaces. It discusses the propagation of fatigue cracks involved in rolling contacts. The characteristics of various types of RCF test machines are summarized. The article concludes with a discussion on the various failure modes of silicon nitride in rolling contact. These include the spalling fatigue failure, the delamination failure, and the rolling-contact wear.
Book Chapter
Rolling-Contact Wear
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
... Abstract This article discusses the physical signs of rolling-contact wear (RCW). It lists the major considerations in gear design and describes the mechanisms of RCW. The article provides a guide to rolling-contact fatigue (RCF) testing methods. It explains the steps involved in the processes...
Abstract
This article discusses the physical signs of rolling-contact wear (RCW). It lists the major considerations in gear design and describes the mechanisms of RCW. The article provides a guide to rolling-contact fatigue (RCF) testing methods. It explains the steps involved in the processes of RCF and RCW.
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003316
EISBN: 978-1-62708-176-4
... Abstract Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. During fretting fatigue, cracks can initiate at very low stresses, well below the fatigue limit of nonfretted...
Abstract
Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. During fretting fatigue, cracks can initiate at very low stresses, well below the fatigue limit of nonfretted specimens. This article describes the mechanisms of fretting and fretting fatigue; stress analysis, modeling, and prediction of fretting fatigue; fretting fatigue testing; and fretting prevention methods. Three general geometries and loading conditions for fretting fatigue, along with their remedies, are reviewed.
Book: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002372
EISBN: 978-1-62708-193-1
... Abstract Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. This article focuses on measures to avoid or minimize crack initiation and fretting fatigue. It lists...
Abstract
Fretting is a special wear process that occurs at the contact area between two materials under load and subject to slight relative movement by vibration or some other force. This article focuses on measures to avoid or minimize crack initiation and fretting fatigue. It lists the factors that are known to influence the severity of fretting and discusses the variables that contribute to shear stresses. These variables include normal load, relative displacement (slip amplitude), and coefficient of friction. The article describes the general geometries and loading conditions for fretting fatigue. It presents the types of fretting fatigue tests and the effect of variables on fretting fatigue from different research test programs. The article also lists the general principles and practical methods for the abatement or elimination of fretting fatigue.
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006414
EISBN: 978-1-62708-192-4
... in the numerous interwire contacts, leading to both fretting wear and fretting fatigue ( Ref 9 ); results of studies of fretting damage in an aluminum power line under a vibration damper are given in Ref 10 . Most ropes include some form of internal lubrication to lessen the effects of such movement. Fatigue...
Abstract
Fretting is the small-amplitude oscillatory movement that can occur between contacting surfaces, which are nominally at rest. This article discusses fretting wear in mechanical components and the mechanisms of fretting wear. It describes the role of fretting conditions, such as fretting duration, slip amplitude, normal load, fretting frequency, contact geometry, type of vibration, and surface finish, as well as the role of environmental conditions. The article reviews the influence of an aqueous environment on the mechanism of fretting. The steps that can be taken to reduce or eliminate damage due to fretting are extremely diverse. The article presents some general indications of how to address the fretting wear problem.
Book: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002373
EISBN: 978-1-62708-193-1
.... In many cases, bearing failure is now related to wear rather than to contact fatigue. Good surface finish is necessary for long bearing life. As was noted, contact fatigue is initiated by surface defects like dents and deep scratches. Surface defects not only cause asperity contact in thin-film...
Abstract
Contact fatigue is a surface-pitting-type failure commonly found in ball or roller bearings. This article discusses the mechanisms of contact fatigue found in gears, cams, valves, rails, and gear couplings. It discusses the statistical analysis of rolling contact bearing-life tests. The article concludes with information on various approaches that improve the contact fatigue resistance of rolling contact systems.
Book Chapter
Fretting Wear Failures
Available to PurchaseSeries: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
... for it to occur is in machinery. The contacts between hubs, shrink and press fits, and bearing housings on loaded rotating shafts or axles are particularly prone to fretting damage, but because the movement arises from alternating stresses in the shaft surface, the problem is more one of fatigue than wear ( Ref 6...
Abstract
This article reviews the general characteristics of fretting wear in mechanical components with an emphasis on steel. It focuses on the effects of physical variables and the environment on fretting wear. The variables include the amplitude of slip, normal load, frequency of vibration, type of contact and vibration, impact fretting, surface finish, and residual stresses. The form, composition, and role of the debris are briefly discussed. The article also describes the measurement, mechanism, and prevention of fretting wear. It concludes with several examples of failures related to fretting wear.
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002474
EISBN: 978-1-62708-194-8
... as a result of the nature of the dominant wear mode. For example, fatigue wear modes are frequently stress dependent. For non-conformal contacts at constant load, wear rates would continue to decrease as the wear results in increased contact area and, hence, lower contact stress. Severe versus Mild Wear...
Abstract
Wear is the damage to a solid surface as a result of relative motion between it and another surface or substance. This article discusses the four general ways by which a material can wear, namely, adhesive wear, abrasive wear, fatigue or fatigue-like wear, and corrosive wear. It tabulates the operational classification of wear situations and describes the relationship between wear or wear rate and design parameters. The article reviews the effect of lubrication on wear behavior and the types of lubricants. It illustrates some fundamental criteria that can be applied in the selection of a material for wear applications. The article explains four elements of wear design, such as system analysis, modeling, data gathering, and verification. It concludes with a discussion on the design approach for low-wear computer peripherals.
Image
Scanning electron microscopy micrographs of wear mechanisms and the appeara...
Available to PurchasePublished: 31 December 2017
Fig. 7 Scanning electron microscopy micrographs of wear mechanisms and the appearance of worn materials surfaces. (a) Surface fatigue. Fatigue striations, cracks, and wear particle formation due to cyclic contact stress of a contacting counterbody. (b) Abrasion. Scratches and material removal
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Book Chapter
Forms of Mechanically Assisted Degradation
Available to PurchaseSeries: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003631
EISBN: 978-1-62708-182-5
... Abstract Mechanically assisted degradation of metals is defined as any type of degradation that involves a corrosion mechanism and a wear or fatigue mechanism. This article provides a discussion on the mechanisms of five forms of degradation: erosion, fretting corrosion, fretting fatigue...
Abstract
Mechanically assisted degradation of metals is defined as any type of degradation that involves a corrosion mechanism and a wear or fatigue mechanism. This article provides a discussion on the mechanisms of five forms of degradation: erosion, fretting corrosion, fretting fatigue, cavitation and water drop impingement, and corrosion fatigue. It describes the factors affecting the severity of fretting corrosion. The article also illustrates the relationship between corrosion fatigue and stress-corrosion cracking.
Book Chapter
Failure Analysis of Gears and Reducers
Available to PurchaseSeries: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... lubrication, the measurement of the backlash, and the necessary factors for starting the failure analysis. Next, the article explains various gear failure causes, including wear, scuffing, Hertzian fatigue, cracking, fracture, and bending fatigue, and finally presents examples of gear and reducer failure...
Abstract
This article first reviews variations within the most common types of gears, namely spur, helical, worm, and straight and spiral bevel. It then provides information on gear tooth contact and gear metallurgy. This is followed by sections describing the important points of gear lubrication, the measurement of the backlash, and the necessary factors for starting the failure analysis. Next, the article explains various gear failure causes, including wear, scuffing, Hertzian fatigue, cracking, fracture, and bending fatigue, and finally presents examples of gear and reducer failure analysis.
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... are nucleated by the fretting contact stresses and propagate due to the bulk fatigue stress. The object of this article is to focus on fretting wear related to debris formation and ejection, so the specific problem of fretting fatigue is not discussed in detail. Most of the fretting wear concerns quasi-static...
Abstract
Fretting is a wear phenomenon that occurs between two mating surfaces; initially, it is adhesive in nature, and vibration or small-amplitude oscillation is an essential causative factor. Fretting generates wear debris, which oxidizes, leading to a corrosion-like morphology. This article focuses on fretting wear related to debris formation and ejection. It reviews the general characteristics of fretting wear, with an emphasis on steel. The review covers fretting wear in mechanical components, various parameters that affect fretting; quantification of wear induced by fretting; and the experimental results, map approach, measurement, mechanism, and prevention of fretting wear. This review is followed by several examples of failures related to fretting wear.
Book Chapter
Tribology of Nitrided and Nitrocarburized Steels
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006355
EISBN: 978-1-62708-192-4
... and then oxidized again. Wear Behavior of Nitrided Layers The wear modes of nitrided materials include abrasion, adhesion, tribo-oxidation, as well as contact fatigue ( Ref 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 19 , 20 , 21 , 22 , 23 ). The advantages and disadvantages of the various test...
Abstract
The surface of irons and steels can be hardened by introducing nitrogen (nitriding), nitrogen and carbon (nitrocarburizing), or nitrogen and sulfur (sulfonitriding) into the surface. This article lists the principal reasons for nitriding and nitrocarburizing, and summarizes the typical characteristics of nitriding processes along with a general comparison of carburizing processes in a table. It describes the two most common nitriding methods: gas nitriding and ion (plasma) nitriding. The article discusses the wear behavior of nitrided layers and the wear resistance of selected steels. Rolling-contact fatigue (RCF) occurs in rolling contacts such as bearings, rolls, and gears. The article provides a discussion on rolling-contact fatigue of nitrided steels for aerospace bearing components.
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