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fastener failures

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Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... Abstract This article first provides an overview of the types of mechanical fasteners. This is followed by sections providing information on fastener quality and counterfeit fasteners, as well as fastener loads. Then, the article discusses common causes of fastener failures, namely...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... Abstract This article discusses different types of mechanical fasteners, including threaded fasteners, rivets, blind fasteners, pin fasteners, special-purpose fasteners, and fasteners used with composite materials. It describes the origins and causes of fastener failures and with illustrative...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0048674
EISBN: 978-1-62708-222-8
... structure and the method of plating the fastener with zinc was changed from electroplating to a mechanical deposition process to thus avoid hydrogen embrittlement. Fasteners, corrosion Electroplating Lawn furniture 1060 UNS G10600 Surface treatment related failures Hydrogen damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... Abstract Failure analysis was performed on threaded Ti-6Al-4V fasteners that had fractured in the threads during installation. Scanning electron microscopy (SEM) and optical metallography revealed that the fractures initiated in circumferential shear bands present at the thread roots...
Image
Published: 30 August 2021
Fig. 1 Types of failures in threaded and blind fasteners and in fastened sheet. Source: Ref 3 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0047113
EISBN: 978-1-62708-219-8
... in the supporting girders and could be considered one of the principal fasteners in the track system. Analysis (visual inspection, metallographic exam, and hardness testing) supported the conclusions that fatigue induced by the overhead movement of the crane produced failure of the bolt. The bolt was deficient...
Image
Published: 30 August 2021
Fig. 26 Fatigue failure of fasteners in single-lap shear carbon-graphite composite joints. (a) Fastener pullout resulting from a static tensile load. (b) Fatigue failure of fasteners initiated by cocking of the fasteners. Original magnification for both: 1⅓× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... integrity of aircraft has been the subject of intense review recently. 1 , 2 While corrosion of structural members is of particular importance, failure of fasteners can have catastrophic repercussions as well. Changes in load path and stress distributions caused by fastener failures can produce unexpected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
... effect of galvanic coupling, hydrogen embrittlement. Bolts Galvanic corrosion Spacecraft 17-4 PH UNS S17400 Hydrogen damage and embrittlement Fig. 1 Success of the mission depends greatly on the reliability of high-strength stainless steel fasteners. Analysis of service failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001178
EISBN: 978-1-62708-235-8
... 12 Selected References Selected References • Jensen W.J. , Failures of Mechanical Fasteners , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986 , p 529 – 549 10.31399/asm.hb.v11.a0001812 • Hydrogen Damage and Embrittlement , Failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001678
EISBN: 978-1-62708-218-1
... wheels Bolts Galvanized steels Medium-carbon alloy steel Fatigue fracture Analysis of service failures is a complicated business because several mechanisms can operate simultaneously or sequentially. For example a structural component, bolt (fastener) holding the wheel of a vehicle can...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001306
EISBN: 978-1-62708-215-0
... fracture Background Application This case study concerns the failure of speciality alloy fasteners used in the mounting of dual wheel assemblies in medium and heavy trucks. Circumstances Leading up to Failure The dual rear wheel assembly on the left side of a single rear axle heavy truck...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048634
EISBN: 978-1-62708-225-9
... Hydrogen damage and embrittlement Surface treatment related failures During an inspection of a structure 2 weeks after assembly, the heads of several cadmium-plated AISI 8740 steel fasteners were found to be completely separated from their respective shanks ( Fig. 1 ). Scanning electron microscopy...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
... propagated by stress-corrosion cracking. The cause of cracking was twofold: use of interference-fit fasteners exposed to moisture intrusion from a marine environment and poor hole quality. Failure was intensified by dissimilar-metal contact in the presence of weak acidic electrolyte (dissociated MoS2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001483
EISBN: 978-1-62708-225-9
... Selected References • Jensen W.J. , Failures of Mechanical Fasteners , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986 , p 529 – 549 10.31399/asm.hb.v11.a0001812 • Lampman S. , Intergranular Fracture , Failure Analysis and Prevention...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006432
EISBN: 978-1-62708-217-4
... rough and more granular than would be expected from pure mechanical fatigue. This indicated an allied corrosion mechanism. Cracks other than the one leading to failure were observed. Metallographic examination of the bolt cross section showed many cracks typical of stress-corrosion damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001432
EISBN: 978-1-62708-221-1
... into service. Selected References Selected References • Jensen W.J. , Failures of Mechanical Fasteners , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986 , p 529 – 549 10.31399/asm.hb.v11.a0001812 • Failures Related to Welding , Failure Analysis...
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
... approximately 30% of the stressed area. The fracture mode was intergranular decohesion, and the fracture surface appeared very similar to the failures that occurred in the field. Discussion An initial response to these failures was to determine why both fasteners failed in the same manner, since...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090929
EISBN: 978-1-62708-236-5
... Abstract Size M5 x 0.8 mm, class 8.8 metric screws were failing during application, reportedly at the normal installation torque. Investigation (visual inspection, metallographic analysis, and unetched 8.9x fractographs) supported the conclusion that the fasteners failed via ductile overload...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001582
EISBN: 978-1-62708-233-4
... of the rod and initiated at the last thread that was engaged in the blind hole. In attempts to reduce the tendency for failure, the engine manufacturer: checked the material and quality of the fasteners, placed a radius on the carter end of the fastener to reduce the stress concentration...