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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001901
EISBN: 978-1-62708-218-1
... in particular are susceptible to thermal attack and chemical attack (via acidic, alkaline, and oxidative antagonists), both of which lead to depoloymerization. The Material Safety Data Sheet for Delrin recommends that, during processing, the polymeric melting temperature be less than 230°C. Otherwise, after...
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 , Wear , Vol 120 , 1987 , p 1 – 27 10.1016/0043-1648(87)90130-X 31. Friedrich K. , Wear of Reinforced Polymers by Different Abrasive Counterparts ; Friction and Wear of Polymeric Composites, Composite Materials Series 1 , Friedrich K. , Ed., Elsevier , 1986 , p 233...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001664
EISBN: 978-1-62708-226-6
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001127
EISBN: 978-1-62708-214-3
.... Embrittlement Lubricants Polymers Polymer Brittle fracture Background Two plastic tank floats located in separate toilets in a condominium unit failed within a relatively brief period of time. Circumstances Leading to Failure The floats failed while the condoiminium owner was absent. During...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
..., the resistor termination design, because it incorporated polymeric materials and thus limited metallurgical bonding, was not appropriate for the recommended soldering and encapsulation profiles. This inadequacy was amplified by the presence of the layer of polymer-based contamination at the metallization...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001625
EISBN: 978-1-62708-218-1
... from contact with a ferrous material, such as a steel chip. Chemical analysis Coating defects Discoloration Motorcycle components Polymer (Other, miscellaneous, or unspecified) failure Two acrylic-coated polymeric motorcycle components exhibited fisheye blemishes after painting. Only...
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
... property of PTFE, this polymer has often been used with fillers to form composites. Polytetrafluoroethylene itself has also been used as filler for other polymeric systems such as PE. Figure 13 gives the wear rate of PTFE, and some of its composites when slid against hard metallic surfaces. For surface...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
...Abstract Abstract The article commences with an overview of short-term and long-term mechanical properties of polymeric materials. It discusses plasticization, solvation, and swelling in rubber products. The article further describes environmental stress cracking and degradation of polymers...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
..., polymers cannot be fabricated at their maximum packing density. Molecular scale voids, known collectively as free volume, exist within the polymeric macromolecular structure. Applied stress serves to straighten the polymer chains and perhaps to redistribute the free volume so that sizable microvoids...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... visually or under low magnification are then described. Typical microscopic features observed on structural metals are presented subsequently, followed by a brief discussion on fatigue in polymers and polymer-matrix composites. References References 1. Stephens R. , Fatemi...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... to zero when the polymer starts to melt. However, it should be emphasized that the onset of gross yielding is strongly dependent on strain rate and temperature. The values of T g and T m are important quantities, and the temperature range of operation of a polymeric material is limited. The degree...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... of fatigue in metals. It concludes with a description of fatigue of polymers and composites. References References 1. Stephens R. , Fatemi A. , Stephens R. , and Fuchs H. , Metal Fatigue in Engineering , 2nd ed. , John Wiley & Sons , 2001 2. Collins J.A...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... is impact velocity and v = sliding velocity; ×: v = 0 m/s; •: v = 0.25 m/s; □: v = 1.27 m/s; ▲: v = 3.81 m/s) Abstract Abstract This article discusses the generic features of impact wear on metals, ceramics, and polymers. It describes normal impact wear and compound impact wear, as well...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001624
EISBN: 978-1-62708-218-1
...Abstract Abstract An electronic sensor coil failed continuity testing, indicating that a break was present in the polymer-coated wire. An area of the wire showed a green discoloration and the break in the wire was located in this same region. The discoloration was suspected to be an indicator...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... there are differences in the detailed mechanism of crack growth, particularly in terms of crazing and void formation ahead of the crack tip that can occur in polymers. Nevertheless, the classic appearance of beach marks and striations is observed on the fracture surfaces of polymeric materials that have failed...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... situations, the bodies tend to be large and contact in a well-defined location in a controlled way, unlike erosion where the eroding particles are small and interact randomly with the target surface. This article describes some generic features and modes of impact wear of metals, ceramics, and polymers...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001798
EISBN: 978-1-62708-241-9
.... encapsulant polymer degradation hydrolysis epoxy resin softening and flow differential scanning calorimetry with thermogravimetric analysis curing time epoxy resin Introduction Epoxy resin is generally used as encapsulant in electrical industry to protect the products from damage by shock...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... can appear as discoloration, crazing, and softening to complete breakdown of the polymeric materials. The most common environments that cause degradation of polymers are ultraviolet radiation, industrial chemicals, humidity, ozone and oxygen, microorganisms, and temperature. A combination of two...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
... J.W. , Analysis and Deformulation of Polymeric Materials , Plenum Press , 1997 • Moalli J. , Ed., Plastics Failure: Analysis and Prevention , Plastics Design Library , 2001 • Osswald T.A. and Menges G. , Materials Science of Polymers for Engineers , Hanser...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... the more precisely they will be made and the more likely there will be a support (lubrication) system to ensure long life and to prevent catastrophic failure. The lowest cost bearings are bushings of molded polymers (plastics) in which steel shafts rotate. The lowest cost polymers are the nylons...