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friction performance

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Published: 01 January 2002
Fig. 12 (a) Influence of PTFE on friction and wear performance of PEEK composites and the optimum range of PTFE amount for best combination of μ and K 0 . (b) Linear correlation and synergistic effect as a result of two opposite trends. K 0,M and K 0,L represent specific wear rates More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... was first coined by Peter Jost in 1966, derived from the Greek work tribos , meaning “to rub” ( Ref 2 ). While the term tribology emerged in the 20th century, the study of friction and wear dates back to the late 1400s, when Leonardo da Vinci performed some of the first recorded friction experiments...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
... composites (SFRP and particulate-filled), unidirectional FRP composites, and fabric reinforced composites. Friction and wear performance of the composites, correlation of performance with various materials properties, and studies on wear-of failure mechanisms by scanning electron microscopy are discussed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001533
EISBN: 978-1-62708-225-9
... × 10 −10 6.1 × 10 −10 6.0 × 10 −10 Tribology tests were performed with the help of a friction machine according to a friction pattern disk shoe both at dry friction and in a liquid lubricant medium under the following conditions: sliding speed of 0.79 m/s, pressure from 0.5 to 3.5 MPa...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006869
EISBN: 978-1-62708-395-9
.... A higher load is associated with plastic deformation of asperities and thermal softening of sliding polymer couples that increases the wear rate. At a moderate load, elastic deformation of asperities governs the RP’s tribological performance, friction coefficient, and wear mechanism. In addition, higher...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... lines parallel to the visible crack thought to be fatigue cracks were revealed on examination of the machined surface. The shaft was repaired by welding a new section and machined to required diameters and tapers to avoid abrupt changes. Eccentricity Friction welding 6150 UNS G61500 Fatigue...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... Abstract Friction and wear are important when considering the operation and efficiency of components and mechanical systems. Among the different types and mechanisms of wear, adhesive wear is very serious. Adhesion results in a high coefficient of friction as well as in serious damage...
Image
Published: 01 January 2002
Fig. 8 Friction factors for flow through instrumented sidestreams under biocide treatment in an oilfield-produced water system can indicate biofouling. In this case, biocide “A” loses control of microbial fouling after 80 days, relative to biocide “B,” in a comparison carried out in a field More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... ). Environmental and Lubricant Effects on the Wear Failures of Polymers Except for elastomers, polymers in general are not used in lubricated conditions. However, polymers are often subjected to environmental conditions that affect their friction and wear performance. For example, polymers used in marine...
Image
Published: 01 January 2002
Fig. 14 Influence of inclusion of fillers (individually and simultaneously) on friction and wear performance of PEI composites against mild steel (L 43 N, speed 2.1 m/s, for A 25 N counterface mild steel); A, polyetherimide (PEI); B, (PEI PTFE15% ); C, (PEI GF20% ); D, (PEI GF 16%+graphite 20 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... was ductile overload and that the mechanical properties of the bolts were consistent with exemplar bolts that had been supplied. After eliminating other sources of excessive load application, the most probable cause of failure was ascribed to variances between the frictional characteristics of the bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001530
EISBN: 978-1-62708-225-9
... to attract research interest. 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 The main emphasis of these research efforts has been to understand the wear and frictional mechanism involved and to improve the tribological performance of the copper-based bearing alloys. Among different copper-based alloys, leaded...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
...-Manson equation ( Ref 39 ). Environmental and Lubricant Effects on the Wear Failures of Polymers Except for elastomers, polymers in general are not used in lubricated conditions. However, polymers are often subjected to environmental conditions that affect their friction and wear performances...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
.... Wire ropes’ failures due to friction, martensite or bainite, have also been reported [ 2 , 6 ]. These hard zones or spots, formed on wire surface as a thin layer, are due to the condition of the frictional heat between wires and sheave. The thin martensite layer may crack when the wire is bent...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001754
EISBN: 978-1-62708-241-9
... and transverse), as before, was performed in both the as-polished and then etched condition. The microhardness data shown in Table 1 suggest a tempering effect below the surface of the IR, the result of frictional heating during the failure. The core hardness was found to be within the specified range. Most...
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
... to assess the role of friction in subsurface fatigue cracking in rolling-sliding contact applications. Based on the results of stress calculations and x-ray diffraction testing of steel samples, friction contributes to subsurface damage primary through its effect on the distribution of orthogonal shear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003520
EISBN: 978-1-62708-180-1
...) of performing service failure analysis and the importance of dissemination of such information is well recognized, although industry and academia may not have sufficiently emphasized this in the past, as noted in the 1975 article “Conducting the Failure Examination” ( Ref 1 ). In some situations, investigations...
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 Crack Propagation in Rolling Contact Fracture Mechanics Approach Fatigue crack propagation is always involved in RCF failure. Many efforts have been completed to relate crack propagation behavior with RCF life performance since the publication of a delamination wear theory arising from...
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
... ( Ref 60 ). In addition, improvement in frictional properties of the contacting pair, for example, by DLC and molybdenum coatings, provides additional improvements in RCF performance. Rolling-Contact Fatigue Failure Modes of PVD Coatings Despite numerous studies to comprehend the RCF performance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
... of the bolts. Crankshafts Diesel engines Flanges Fretting fatigue Marine engines Carbon steel Fretting wear Fatigue fracture Transgranular fracture Fretting-fatigue cracks are normally initiated under a combination of local shear stress, produced by the frictional forces between the rubbing...