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failure modes and criticality analysis

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
... mechanism or ductile overload failure. SEM analysis revealed that the mode of fracture was intergranular decohesion, which indicates an environmental influence in the fracture mechanism. The primary fracture initiated at a thread root and propagated by environmentally-assisted slow crack growth until final...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... in terms of their consequences. During the 1970s and '80s, various military and professional society standards were written to define the analysis methodology ( Ref 5 , 6 , 7 , 8 ). MIL-STD 1629 (ships), “Procedures For Performing a Failure Mode Effects and Criticality Analysis” ( Ref 9 ) was published...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001140
EISBN: 978-1-62708-227-3
... were due to subcritical crack growth prompted a study of subcritical cracking in aluminum alloys used in cylinder fabrication and demonstrated the need for a critical review of the criterion utilized when designing high pressure aluminum cylinders. Failure Analysis Several failed high pressure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0005695
EISBN: 978-1-62708-180-1
... involved in solving a failure analysis problem, in that it increases their own comprehension of the physical facts and also facilitates communication with the other parties who need to understand the results of the investigation. Strict use of proper terminology is critical to clear communication...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... of a surface defect that would lead to catastrophic SCC failure of the 4340 steel MLG beam ( Ref. 1 ). The critical SCC crack size was calculated to be 3.2 mm ( 1 8 in.) wide and 1.7 mm ( 1 16 in.) deep. Based on the results of the said analysis, it was determined that the SCC crack had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001503
EISBN: 978-1-62708-234-1
...-carbon martensite and pearlite. The case structure displayed very fine tempered martensite throughout, and no retained austenite. And the surface structure showed no evidence of frictional distress; it had been cleanly cut by abrasion. Final Analysis The mode of failure was severe abrasive wear...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001299
EISBN: 978-1-62708-215-0
... the distinct eye zone of a fatigue crack. 1.11× Abstract A 4340 steel piston engine crankshaft in a transport aircraft failed catastrophically during flight. The fracture occurred in the pin radius zone. Fractographic studies established the mode of failure as fatigue under a complex combination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001672
EISBN: 978-1-62708-236-5
... spring fracture surface at the crack origin of the longitudinal defect; and, (d) SEM view of a secondary crack or crack branching. Fractographic analysis of the spring fracture surfaces revealed a corroded morphology as can be seen in Figure 3 . No clear evidence of the mode of failure could...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006798
EISBN: 978-1-62708-295-2
... loading conditions. It is defined within ASME Failure Methods and Effects Analysis terminology, and there are some eight additional definitions in Webster’s Unabridged Dictionary . There are still more uses of the term, as in fracture mode , failure mode , and so on. These latter two terms...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006840
EISBN: 978-1-62708-329-4
... involved in solving a failure analysis problem, in that it increases their own comprehension of the physical facts and also facilitates communication with the other parties who need to understand the results of the investigation. Strict use of proper terminology is critical to clear communication...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... Abstract This article describes the two critical goals in a failure investigation: damage mechanisms and damage modes. It explains the determination of primary and secondary damage mechanisms and discusses the methodology used to classify the damage mechanisms. damage damage modes...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
... process that uses visual observations of features present on a failed component fracture surface combined with component and environmental conditions to determine the root cause of a failure. Recording the features observed in a failure analysis is critical both for documentation of the condition...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001293
EISBN: 978-1-62708-215-0
.... Region of significant wear is denoted by arrow. Fig. 3 Optical fractograph of Face A (arrow identifies crack origin). Approximately 0.81× Fig. 4 SEM showing intergranular mode of failure. Approximately 350× Fig. 5 EDS spectrum from within a pit adjacent to the fracture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... characterization approaches and categorization methods of damage mechanism are also covered. damage mechanism damage modes damage failure analysis THE PRINCIPAL TASK OF A FAILURE ANALYST during a physical-cause investigation is to identify the sequence of events involved in the failure. Technical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... appearance transition tempera- ture fcc face-centered cubic FCAW flux cored arc welding FDA Food and Drug Administration FEA finite element analysis FFS fit for service FHA fault hazard analysis Fig. figure FMEA failure modes and effects analysis FMECA failure modes, effects, and criticality analysis FRP...
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
..., and material, which are discussed in the following sections along with examples. The tools available for failure analysis are then covered. Further, the article describes the categories of mode of failure: distortion or undesired deformation, fracture, corrosion, and wear. It provides information...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003527
EISBN: 978-1-62708-180-1
... is an investigative process in which visual observations are made and conclusions are drawn based on physical evidence and features present on a failed component. Recording the features observed in a failure analysis is critical both to document the component condition and to communicate the results of the failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... grade line pipe tested at -15 °F (-26 °C), well below its 50% shear-area DWTT Despite substantial reductions in the DBTT of line pipe steels, line pipe failures still occurred; this time, however, they occurred under a ductile fracture mode ( Ref 5 ). It was subsequently learned that the absorbed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001527
EISBN: 978-1-62708-224-2
... in-between. However, wires are often mechanically damaged after failure. Most nondestructive evaluation (NDE) techniques are not applicable to wire rope failures. Electron microscope fractography of fracture surfaces is essential in failure analysis. Fatigue is the most important fracture mode in wire ropes...