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background data assembling

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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
... Abstract This article outlines the basic steps to be followed and the range of techniques available for failure analysis, namely, background data assembling, visual examination, microfractography, chemical analysis, metallographic examination, electron microscopy, electron microprobe analysis...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006762
EISBN: 978-1-62708-295-2
... progresses, particularly when testing is inconclusive, contradictory, or cannot be performed. Failure analysts can and should change their theory of failure as the investigation progresses if the data warrant another investigative path. Frequently, customers without a background in materials, engineering...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001294
EISBN: 978-1-62708-215-0
... AM350 Intergranular fracture Intergranular corrosion Background A poppet valve assembly failed a helium pressure test ( Ref 1 , 2 ). Applications The poppet valve assembly is part of the fuel isolation valve. This valve isolates hydrazine from an auxiliary power unit that drives...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... fitting and two ASME SB-148 CA 954 valve bodies) and an entire valve assembly. The leaks were found to be in the socket-weld crevice area and had resulted from dealloying. It was recommended that the weld joint geometry be modified. Control valves Cooling systems Cooling water Hydraulic valves...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001618
EISBN: 978-1-62708-219-8
.... The sources of residual stress included welding, environment, and assembly operation. Chemistry Dimensional tolerance Embrittlement Heat-affected zone Residual stress Tensile strength Weld ASTM A588 Fatigue fracture Joining-related failures Background A Midwest power authority reported...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001268
EISBN: 978-1-62708-215-0
... Abstract A missile detached from a Navy fighter jet during a routine landing on an aircraft carrier deck because of a faulty missile launcher detent spring. Visual inspection of Inconel 718 detent spring assembly revealed that four of the nine spring leafs comprising the assembly were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001325
EISBN: 978-1-62708-215-0
... Abstract A carbon steel piping cross-tee assembly which conveyed hydrogen sulfide (H7S) process gas at 150 to 275 deg C (300 to 585 deg F) with a maximum allowable operating pressure of 3 MPa (450 psig) ruptured at the toe of one of the welds at the cross after several years of service...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001363
EISBN: 978-1-62708-215-0
.... Aircraft components Bearing steel Wind tunnels 52100 UNS G52986 Rolling-contact wear Background An accidental overspeed condition during wind tunnel testing resulted in the destruction of a propeller rotor. Applications The prop test rig (PTR) had been used for 20 years to test a number...
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
... the analysis of the evidence with a quantitative understanding of the stressors and background information on the design, manufacture, and service history of the failed product or system. Just as failure analysis is a proven discipline for identifying the physical roots of failures, root-cause analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003518
EISBN: 978-1-62708-180-1
... administrators, and many other fields. Commercial software tools These exist for a variety of functions, including tracking the course of an investigation and suggesting a course of action for the background data collection. In many cases, particularly when litigation is or may be involved...
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
.... Collaboration with experts in other disciplines is required in certain circumstances to integrate the analysis of the evidence with a quantitative understanding of the stressors and background information on the design, manufacture, and service history of the failed product or system. A thorough failure...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006754
EISBN: 978-1-62708-295-2
... tools These exist for a variety of functions, including tracking the course of an investigation and suggesting a course of action for the background data collection. In many cases, particularly when litigation is or may be involved, it is preferable to define and document how the decision about...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001027
EISBN: 978-1-62708-214-3
... was recommended, along with nondestructive inspection of the region at intervals determined by fractographic analysis of the fatigue crack growth. Bolted joints Drives Helicopters Military planes Shafts (power) 4340 UNS G43400 Corrosion fatigue Background The 4340 steel main rotor yoke...
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
... Fatigue fracture Background A piece of wheel flange separated from the main landing gear wheel of a C130 aircraft as it taxied on a runway. The wheel, forged from 2014-T61 aluminum, had been in service nearly 20 years. Applications The landing gear wheel of the C130 aircraft was composed...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... data generated, and methods utilized, during acceptance are still applicable to aid with the failure analysis. If the assembly is a mechanical component, the case may be that only the amount of wear or electrical connection may be of importance and other parts such as the casing or mounting points may...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... failure by stress-corrosion cracking under sustained loading if the atmosphere was saturated with water vapor. Dissimilar metals, bonding Pressure welding Stainless steels, bonding Welded joints, corrosion Silver Stress-corrosion cracking Background Silver solid-state bonded components...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001560
EISBN: 978-1-62708-217-4
... Ignition systems Stress corrosion tests 4340 UNS G43400 Stress-corrosion cracking Introduction Military aircraft use a cartridge ignition system for emergency engine starts. A solid propellant cartridge is placed in a cartridge chamber/breech chamber assembly and electrically ignited...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... that the design be modified to avoid dissimilar metal combinations of high corrosion potential. Airplanes Steels Transition joints 7014 UNS A97014 Stress-corrosion cracking Background A twin-turboprop transport aircraft sustained considerable damage when one of its main landing gear assemblies...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001790
EISBN: 978-1-62708-241-9
... Fig. 1 High-speed pinion shaft assembly in the as-received condition Fig. 2 Shaft section removed for examination Fig. 3 Mating shaft fracture surfaces Fig. 4 Mating shaft fracture surfaces after ultrasonic cleaning. Arrows denote initiation location. Fig...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001144
EISBN: 978-1-62708-217-4
... Abstract A helicopter was hovering approximately 10 ft above a ship when one spar section failed explosively. Visual inspection revealed a crack had progressed through one member of a dual spar plate assembly at a fold pin lug hole. The remaining spar plate carried the blade load until...