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Image
Specific wear rates for phenolic resin and its composites. The data are rep...
Available to PurchasePublished: 01 January 2002
Fig. 8 Specific wear rates for phenolic resin and its composites. The data are reported for various experimental conditions and pv (pressure × velocity) factors as reported in the literature. Specimen Sliding speed ( v ), m/s Normal pressure ( p ) Counterface roughness ( R a ), μm
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Image
Wear rate of PTFE and its composites under different experimental condition...
Available to PurchasePublished: 01 January 2002
Fig. 13 Wear rate of PTFE and its composites under different experimental conditions. For specimens 1 to 4: sliding speed ( v ) = 0.2 m/s; normal pressure ( p ) = 0.05 MPa (0.007 ksi). Source: Ref 16 . For specimens 7 to 9: sliding speed ( v ) = 1.6 m/s; normal pressure ( p ) = 0.69 MPa (0.10
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Image
Relative abrasive wear loss of polymethylmethacrylate (PMMA) and composites...
Available to PurchasePublished: 01 January 2002
Fig. 2 Relative abrasive wear loss of polymethylmethacrylate (PMMA) and composites filled with quartz and glass against abrasives SiC (45 μm), WIB, SiO 2 (10 μm) and CaCO 3 (3 μm) as a function of filler volume fraction, V f . WIB, weak interfacial bond; SIB, strong interfacial bond: 1
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Scanning electron micrographs of abraded surfaces of composites against 80 ...
Available to PurchasePublished: 01 January 2002
Fig. 6 Scanning electron micrographs of abraded surfaces of composites against 80 grade SiC paper and under 14 N load. (a) Polyetherimide (PEI) + 10% glass fiber (GF) showing extensive damage to matrix and fiber; cavities left after fiber consumption. PEI + 30% GF. (b) Fiber on the stage
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Image
Scanning electron microscope micrographs of abraded PEI composites reinforc...
Available to PurchasePublished: 01 January 2002
Fig. 9 Scanning electron microscope micrographs of abraded PEI composites reinforced by various fabrics; L 12 N, SiC paper 80 grade (grit size 175 μm); distance slid 10 m (33 ft). O P , fabric parallel to the sliding plane; O N , fabric normal to the sliding plane. (a) PEI AF (O P ) showing
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Image
Published: 01 January 2002
Fig. 11 Influence of fillers on friction and wear behavior of PEEK composites; L , Normal load, 196 N; speed 0.445 m/s; counterface plain carbon steel ring. (a) nanometer-sized SiC in PEEK; (b), and (c) PTFE in PEEK and PEEK + SiC (3.3 vol% constant) composites. Source: Ref 40
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(a) Influence of PTFE on friction and wear performance of PEEK composites a...
Available to PurchasePublished: 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
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Scanning electron micrographs of worn surfaces of PEI composites indicating...
Available to PurchasePublished: 01 January 2002
Fig. 15 Scanning electron micrographs of worn surfaces of PEI composites indicating (a) transfer of thin and coherent film of PTFE on the steel disc responsible for lowest μ exhibited by (PEI PTFE15% ). (b) Film transfer (less coherent and thin) in the case of (PEI GF25% + PTFE15% + (MoS 2
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Wear failure of PEI and composites (a) Failed surface of PEI while sliding ...
Available to PurchasePublished: 01 January 2002
Fig. 16 Wear failure of PEI and composites (a) Failed surface of PEI while sliding against very smooth ( R a 0.06 μm) aluminum surface resulting in high μ (L 28 N; v 2.1 m/s) Left part shows severe melt flow of PEI; middle portion shows crater with chipped-off molten material ( Ref 46 ). (b
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Specific wear rate and friction coefficient of unidirectional composites (s...
Available to PurchasePublished: 01 January 2002
Fig. 17 Specific wear rate and friction coefficient of unidirectional composites (see Table 4 ) in three orientations ( P , 1.5 N/mm 2 ; V , 0.83 m/s; distance slid, 16 km).
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Specific wear rates of hybrid composites formulated by two structures, sand...
Available to PurchasePublished: 01 January 2002
Fig. 21 Specific wear rates of hybrid composites formulated by two structures, sandwich and layer, (composite aramid fiber-carbon fiber polyamide am). Source: Ref 5
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Image
Specific wear rates for phenolic resin and its composites. The data are rep...
Available to PurchasePublished: 15 May 2022
Fig. 7 Specific wear rates for phenolic resin and its composites. The data are reported for various experimental conditions and pv (pressure × velocity) factors as reported in the literature as given in Table 2 .
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Image
Wear rate of PTFE and its composites under different experimental condition...
Available to PurchasePublished: 15 May 2022
Fig. 12 Wear rate of PTFE and its composites under different experimental conditions. For specimens 1 to 4: sliding speed ( v ) = 0.2 m/s; normal pressure ( p ) = 0.05 MPa (0.007 ksi). Source: Ref 14 . For specimens 7 to 9: sliding speed ( v ) = 1.6 m/s; normal pressure ( p ) = 0.69 MPa (0.10
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Book Chapter
Damage Assessment in a Kevlar/Polyester Composite Component
Available to PurchaseSeries: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001517
EISBN: 978-1-62708-217-4
... Abstract The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had to be utilized...
Abstract
The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had to be utilized to determine the exact nature of the defect. The investigation describes how cross-sectioning, fractography, and chemical analysis were utilized to determine the type of defect responsible for the signal attenuation.
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... of corrosion products, the geometry of fracture surfaces, or inaccessibility of the component making chemical analysis a challenge. The investigator must take every precaution to avoid delivering misleading compositional information, and engineering/scientific judgement is key in providing the best possible...
Abstract
Chemical analysis is a critical part of any failure investigation. With the right planning and proper analytical equipment, a myriad of information can be obtained from a sample. This article presents a high-level introduction to techniques often used for chemical analysis during failure analysis. It describes the general considerations for bulk and microscale chemical analysis in failure analysis, the most effective techniques to use for organic or inorganic materials, and examples of using these techniques. The article discusses the processes involved in the chemical analysis of nonmetallics. Advances in chemical analysis methods for failure analysis are also covered.
Book Chapter
Effects of Composition, Processing, and Structure on Properties of Engineering Plastics
Available to PurchaseSeries: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... Abstract This article provides practical information and data on property development in engineering plastics. It discusses the effects of composition on submolecular and higher-order structure and the influence of plasticizers, additives, and blowing agents. It examines stress-strain curves...
Abstract
This article provides practical information and data on property development in engineering plastics. It discusses the effects of composition on submolecular and higher-order structure and the influence of plasticizers, additives, and blowing agents. It examines stress-strain curves corresponding to soft-and-weak, soft-and-tough, hard-and-brittle, and hard-and-tough plastics and temperature-modulus plots representative of polymers with different degrees of crystallinity, cross-linking, and polarity. It explains how viscosity varies with shear rate in polymer melts and how processes align with various regions of the viscosity curve. It discusses the concept of shear sensitivity, the nature of viscoelastic properties, and the electrical, chemical, and optical properties of different plastics. It also reviews plastic processing operations, including extrusion, injection molding, and thermoforming, and addresses related considerations such as melt viscosity and melt strength, crystallization, orientation, die swell, melt fracture, shrinkage, molded-in stress, and polymer degradation.
Image
Specific wear rate as a function of fiber composition in hybrid composite (...
Available to PurchasePublished: 01 January 2002
Fig. 20 Specific wear rate as a function of fiber composition in hybrid composite ( L 93 N, velocity V ) 0.5 m/s, nominal V f 0.57 with dotted curve for calculated values as per equation in Ref 59 . IROM, inverse rule of mixture; LROM, linear rule of mixture. Source: Ref 59
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Micrograph of the worn surface for a phenolic resin-aramid fiber composite ...
Available to PurchasePublished: 01 January 2002
Fig. 9 Micrograph of the worn surface for a phenolic resin-aramid fiber composite ( Ref 29 ) showing partial coverage of the polymer pin by transfer film
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Image
General trends indicating effect of microstructure of a composite and the p...
Available to PurchasePublished: 01 January 2002
Fig. 10 General trends indicating effect of microstructure of a composite and the properties of fillers on adhesive wear of composites. p , applied pressure; H M , hardness of matrix. AP, P, and N refer to orientations of fibers with respect to sliding direction: AP, antiparallel; P
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