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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001082
EISBN: 978-1-62708-214-3
... of samples from the type 304L stainless steel impeller indicated that the tensile properties met the minimum ASTM criteria. Fatigue test data showed the fatigue performance characteristics ( S-N curve) of the 304L stainless steel to be interior to those of the nickel-aluminum-bronze. Examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090433
EISBN: 978-1-62708-218-1
...-white in color, while the control parts had a pure white appearance. An analysis of both sets of parts was performed using micro-FTIR in the ATR mode. A direct comparison of the results produced a good match, with both sets of spectra exhibiting absorption bands that were characteristic of a nylon resin...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... 2 Comparison of ultrasound, radiography, and x-ray computed tomography Performance characteristic Ultrasound Radiography Computed tomography Parameter imaged Acoustic impedance differences, attenuation, velocity Attenuation Attenuation Handling Immersion, squirter...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001128
EISBN: 978-1-62708-214-3
... Abstract Creep crack growth and fracture toughness tests were performed using test material machined from a seam welded ASTM A-155-66 class 1 (2.25Cr-1Mo) steel steam pipe that had been in service for 15 years. The fracture morphology was examined using SEM fractography. Dimpled fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090424
EISBN: 978-1-62708-222-8
... micro-FTIR in the attenuated total reflectance (ATR) mode. The obtained spectrum exhibited absorption bands characteristic of polycarbonate, as shown in Fig. 1 . No evidence of material contamination was found. A similar analysis was performed on the part surface in an area that showed the anomalous...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
... of the stress response of parts. The viscoelastic characteristics of polymers are an important performance differentiator relative to other classes of materials whose analysis traditionally forms the basis of the standard design curriculum of engineering schools. A thorough understanding of the viscoelastic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001704
EISBN: 978-1-62708-218-1
... steel welds, typically when there is little or no flow of the contained liquid. Positive identification of MIC can be difficult, as many of its characteristics are common to other types of pitting corrosion, such as chloride attack. Therefore, diagnosis should be performed carefully...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006914
EISBN: 978-1-62708-395-9
... of the polymeric materials being used, and polymers modified to improve heat resistance may also possess processing, performance, and cost limitations. Examples of the first approach include substituting polymers that are inherently fire resistant such as polytetrafluoroethylene (PTFE) or silicon. The second...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... analyses are performed on metal and plastic materials center primarily on the techniques used to evaluate the composition and structure of the material. Unlike metals, polymers have a molecular structure that includes characteristics such as polymer functional groups, molecular weight, molecular weight...
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
... characteristic of polycarbonate Fig. 14 Spectral comparison showing differences between the base material and surface spectra, attributed to diphenyl carbonate Fig. 15 Scanning electron image showing isolated degradation of the grip material. 30× Fig. 16 The FTIR spectrum obtained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0060104
EISBN: 978-1-62708-220-4
... Abstract Eddy current inspection was performed on a vertical evaporator unit (that contained 180 tubes) used in a chemical processing plant. It was advised that the tube material was type 316 stainless steel. The shell-side fluid was condensate and gaseous methylene chloride, while the tube...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090466
EISBN: 978-1-62708-218-1
... Abstract A production lot of mechanical hinges used in an automotive application had failed during incoming quality-control routine actuation testing. A change in part supplier had taken place between the approval of the prototype parts that performed acceptably and the receipt of the first lot...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003504
EISBN: 978-1-62708-180-1
... Abstract Reliability-centered maintenance (RCM) is a systematic methodology for preventing failures. This article discusses the history of RCM and describes the key characteristics of an RCM process, which involves asking seven questions. The first four questions comprise a form of failure...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006817
EISBN: 978-1-62708-329-4
..., the description of functional failures in an RCM process has one characteristic: it identifies all of the failed states associated with each function ( Ref 1 ). If the performance standards were defined well, this exercise will be simple, yet precise. If the function of a pump is to provide at least 300 L/min...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001354
EISBN: 978-1-62708-215-0
... was chosen, and the rotor was returned to service; it has performed for more than 1 year without further incident. Compressors Sodium hydroxide, environment Steam turbines ASTM A470 grade 4 UNS K22878 Stress-corrosion cracking Intergranular corrosion Background An A-470 (Grade 4) steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090448
EISBN: 978-1-62708-222-8
... Scanning electron image showing brittle fracture features at the crack initiation site, characteristic of environmental stress cracking. 24× Micro-FTIR in the ATR mode was performed on the housing material, and the resulting spectrum was in agreement with the stated resin description, a blend of PC...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
.... Materials selection is just one part of this overall design process, which may involve a complex set of relationships regarding product function, shape, materials, and manufacturing process ( Fig. 1 ) ( Ref 1 ). In the past, engineering design was performed as a sequential procedure, with the material...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
... of chromium with smaller levels of aluminum, silicon, titanium, manganese, iron, and nickel. Discussion Metallurgical changes can occur as a result of high-temperature exposure. Such changes can strongly influence performance characteristics. Conditions such as intergranular oxidation and creep voiding...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001047
EISBN: 978-1-62708-214-3
... the tube sheet to the floating skirt. Cracks penetrated deep into the tube sheet, and occasionally into the tube walls. The microstructures of both alloys and of the weld appeared normal. Intergranular corrosion characteristic of end-grain attack was apparent. A low dead spot at the skirt / tube sheet...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... selection is just one part of this overall design process, which may involve a complex set of relationships regarding product function, shape, materials, and manufacturing process ( Fig. 1 , Ref 1 ). In the past, engineering design was performed as a sequential procedure, with the material decisions made...