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Fasteners

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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 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...
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
... Abstract During an inspection of a structure two weeks after assembly, the heads of several cadmium-plated AISI 8740 steel fasteners were found to be completely separated from their respective shanks. SEM examination of the fracture surfaces revealed a brittle, intergranular fracture mode...
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...
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Published: 15 January 2021
Fig. 7 Failed Ti-6Al-4V shear fasteners. The fasteners were cadmium plated for galvanic compatibility with the aluminum structure. (a) Photograph showing failure at the head-to-shank fillet. (b) Intergranular fracture morphology. Failure was attributed to liquid-metal-induced embrittlement More
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
... Abstract Fasteners, made in high-production progressive dies from 0.7 mm thick cold-rolled 1060 steel, were used to secure plastic fabric or webbing to the aluminum framework of outdoor furniture. It was found that approximately 30% of the fasteners cracked and fractured as they were compressed...
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Published: 01 January 2002
Fig. 1 Types of failures in threaded and blind fasteners and in fastened sheet. Source: Ref 2 More
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Published: 01 January 2002
Fig. 3 Cracked HL22-8 aluminum alloy 7075-T6 fasteners. (a) and (b) Typical cracked fastener head. (c) Typical head cracks produced by installing fasteners in misaligned holes during testing More
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Published: 01 January 2002
Fig. 14 Cadmium-plated AISI 8740 alloy steel fasteners that failed by hydrogen embrittlement. See also Fig. 15 . More
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Published: 01 January 2002
Fig. 15 Scanning electron micrograph of fracture surface of fasteners shown in Fig. 14 . 880× More
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Published: 01 January 2002
Fig. 21 Types of blind fasteners used in assembled components. More
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Published: 01 January 2002
Fig. 26 Fatigue failure of fasteners in single-lop 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. Both 1 1 3 × More
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Published: 01 January 2002
Fig. 5 Design details that can affect galvanic corrosion. (a) Fasteners should be more noble than the components being fastened; undercuts should be avoided, and insulating washers and spaces should be used to completely isolate the fastener. (b) Weld filler metals should be more noble than More
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Published: 01 January 2002
Fig. 6 Failed Ti-6AI-4V shear fastener. The fasteners were cadmium plated for galvanic compatibility with the aluminum structure. (a) Photograph showing failure at the head-to-shank fillet. (b) Intergranular fracture morphology. Failure was attributed to LMIE caused by excessive temperature More
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Published: 30 August 2021
Fig. 1 Types of failures in threaded and blind fasteners and in fastened sheet. Source: Ref 3 More
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Published: 30 August 2021
Fig. 2 (a) Cracked HL 22-8 aluminum alloy 7075-T6 fasteners. (b) Typical cracked fastener head. (c) Typical head cracks produced by installing fasteners in misaligned holes during testing More
Image
Published: 30 August 2021
Fig. 14 Cadmium-plated AISI 8740 alloy steel fasteners that failed by hydrogen embrittlement. See also Fig. 15 . More
Image
Published: 30 August 2021
Fig. 15 Scanning electron micrograph of fracture surface of fasteners shown in Fig. 14 . Original magnification: 880× More
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Published: 30 August 2021
Fig. 20 Types of blind fasteners used in assembled components More
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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