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service life anomalies

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., design deficiencies, material defects, manufacturing/installation defects, and service life anomalies, with examples. The article describes several common charting methods that may be useful in performing an RCA. It also discusses other failure analysis tools, including review of all sources of input...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006870
EISBN: 978-1-62708-395-9
... Abstract This article examines the concept of fractography as applied to elastomeric rubbery materials. It considers four general categories of physical root failure causes: design defects, material defects, manufacturing defects, and service life anomalies. Examples of real-world failures...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... operates in service. The service life of a product includes its operation, maintenance, inspection, repair, and modification. Failures due to anomalies in any one of these aspects of service life are unique from those created during the design, procurement of materials, and manufacture of products...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089258
EISBN: 978-1-62708-218-1
... on the inside diameter of the sleeve. 155× Using the application-life diagram, the strong effects of minute surface anomalies in this fracture critical component is clearly apparent ( Fig. 7 ). As a result of the severity of the pressure cycles in service, the sleeve cannot tolerate surface flaws...
Series: 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
... nature of the resin anomaly was not directly determined, indirect evidence indicated that the resin anomaly was the result of moisture absorption by the resin. Selected Reference Selected Reference • Thompson R.B. , Nondestructive Evaluation and Life Assessment , Failure Analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... information on fatigue life assessment, elevated-temperature life assessment, and fitness-for-service life assessment. elevated-temperature life assessment fabrication failure analysis fatigue life assessment fitness-for-service life assessment material defects nondestructive inspection stress...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
... of the structural design process, the failure analysis process, the failure investigator's role, and how failure analysis of structural components integrates into the determination of remaining life, fitness-for-service, and other life assessment concerns. The topics discussed include industry perspectives...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001636
EISBN: 978-1-62708-217-4
.... Fig. 1 Failure location in the monolithic rotor hub, a Ti-6Al-4V forging Fig. 2 Macrophotograph of the yellow arm outboard fracture surface. The failure origin is arrowed. The rotor hub had accumulated 3591.9 service hours until the failure, whereas the overall design safe-life had...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... of the shaft occurred while the vessel was sailing along the Canadian coast. The failed shaft has been in service for about six years up to the moment of failure. An excerpt from the assembly drawing pertaining to the propulsion system shows the position of the fracture plan on the shaft and the details...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001025
EISBN: 978-1-62708-214-3
... was observed. Instead, multiple initiation sites and the lack of any anomalies or defects associated with these sites suggested that the fatigue strength of the wheel material had simply been exhausted. Fatigue analyses accurately predicted the cyclic life demonstrated by the failed wheel during...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006814
EISBN: 978-1-62708-329-4
.... Edwards, in the context of inspection, said ( Ref 23 ): “Any discussion of nondestructive examination (NDE) requires a clear definition of the term defect . A defect is a discontinuity that creates a substantial risk of failure in a component or structure during its service life.” This definition...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
... independent or time invariant. For the simple strength ( R )-stress ( S ) case, S could represent the largest stress during the service life and R the strength. The distribution (mean, standard deviation, and distribution family) of each is assumed to be constant, that is, not a function of time...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... as it is practical. Estimating Remaining Service Life Estimating service life is possible when the initial flaw size is either postulated or measured by an NDI technique. Using the material threshold for cracking and a simplified fracture mechanics model, the following two issues can be addressed. [3...
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
... shafts are more an integral part of a machine and transmit motion directly, such as in crankshafts. Complex machine shafts can convert reciprocating motion into rotational motion and vice versa. Shafts operate under a broad range of service conditions, including dust-laden or corrosive atmospheres...
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
... of the two processes are reversed. Design is the process of synthesizing and analyzing service conditions into the reality of an actual or hypothetical component. In contrast, failure analysis may be visualized as the dissection of an actual component in order to synthesize and understand the significance...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... Abstract Two shafts that transmit power from the engine to the propeller of a container ship failed after a short time in service. The shafts usually have a 25 year lifetime, but the two in question failed after only a few years. One of the shafts, which carries power from a gearbox...
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
... are essential to proper service and cannot be subordinated, whereas secondary requirements are those where judicious compromises can be made. For example, life-cycle considerations (such as recycling or environmental impact) may be a primary or secondary criterion, depending on the product objectives...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... continue to stretch throughout normal service and that the reduced-diameter measurement may be used to indicate when ropes should be replaced. Wire ropes should be considered a consumable because they do not have infinite life. The preceding remarks apply to bright (nonplated) ropes of a type intended...
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
... service abuses Improper maintenance and repair Environment-material interactions Not all failures are catastrophic. Many failures involve a gradual degradation of properties or excessive deformation or wear until the component is no longer functional long before its design life is reached...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001598
EISBN: 978-1-62708-232-7
... the location of a leak(s) that was observed during operation, 2) determine if the leak(s) resulted from the new melting process or resulted from anticipated degradation during its service life, 3) determine the failure mechanism associated with the leak site(s), and 4) evaluate the overall metallurgical...