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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091674
EISBN: 978-1-62708-217-4
... Abstract Forged aluminum alloy 2014-T6 hinge brackets in naval aircraft rudder and aileron linkages were found cracked in service. The cracks were in the hinge lugs, adjacent to a bushing made of cadmium-plated 4130 steel. Investigation (visual inspection and 250X micrographs) supported...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... Fig. 1 A typical installation of three pole-mounted transformers Fig. 2 The top section of a representative fractured bracket Fig. 3 The bottom section of the fractured bracket shown in Fig. 2 Fig. 4 The fracture surface of the bracket shown in Fig. 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090424
EISBN: 978-1-62708-222-8
... Abstract A plastic bracket exhibited relatively brittle material properties, which ultimately led to catastrophic failure. The part had been injection molded from a medium-viscosity polycarbonate resin and had been in service for a short duration prior to the failure. Investigation (visual...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0090974
EISBN: 978-1-62708-235-8
... Abstract A cast steel bracket manufactured in accordance with ASTM A 148 grade 135/125 steel failed in railroad maintenance service. Ancillary property requirements included a 285 to 331 HB hardness range and minimum impact energy of 27 J (20 ft·lbf) at -40 deg C (-40 deg F). The conditions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001734
EISBN: 978-1-62708-234-1
... Abstract An aircraft engine in which an in-flight fire had occurred was dismantled and examined. A bracket assembly fabricated from 2024 aluminum, one of several failed components, was of prime interest because of apparent heat damage. Scanning electron microscopy was used to compare laboratory...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001414
EISBN: 978-1-62708-221-1
... to the premature failure. Furthermore, there were no indications that corrosion had contributed to the fatigue cracking. Brackets Clevis Steel Fatigue fracture Corrosion fatigue The photograph, Fig. 1 , shows complementary views of the fracture of a clevis which formed part of the derricking gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001506
EISBN: 978-1-62708-217-4
.... A bracket which supports the in-line fuel flow transducer also was found broken. Examination of the elbow fracture revealed characteristics of low-cycle fatigue failure. Examination of the support bracket fractures revealed a high-cycle mode of fatigue failure, with the primary fatigue extending along...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001745
EISBN: 978-1-62708-217-4
... Abstract A 2000-T6 aluminum alloy bracket failed in a coastal environment because corrosive chlorides got between the bracket and attachment bolt. The material used for the part was susceptible to stress corrosion under the service conditions. Cracking may have been aggravated by galvanic...
Image
Published: 01 June 2019
Fig. 1 Fracture of a cast steel bracket. (a) Bracket microstructure exhibiting gross type II manganese sulfide stringer inclusions. Unetched. 119×. (b) The microstructure consisted of tempered martensite, with the inclusions likely present at the prior-austenite grain boundaries. 2% nital etch More
Image
Published: 01 January 2002
Fig. 20 Fracture of a cast steel bracket ( example 9 ). (a) Bracket microstructure exhibiting gross type II manganese sulfide stringer inclusions. Unetched. 119×. (b) The microstructure consisted of tempered martensite, with the inclusions likely present at the prior-austenite grain boundaries More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047521
EISBN: 978-1-62708-218-1
... in each instance initiating at a weld that joined the edge of the lower flange to the support bracket casting. The cracks propagated through the flange on each side until the effective cross-sectional area had been reduced sufficiently to bring about sudden and complete fracture of the remaining web...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001452
EISBN: 978-1-62708-232-7
... Abstract A bracket which formed part of the carrier of a chain conveyor system used to transport components through a continuous oven fractured. A brittle crack originated on the inside of the right-angled bend, the surface having oxidized subsequently. The remaining portion of the fracture...
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Published: 01 June 2019
Fig. 1 Fractured chain conveyor carrier bracket showing position of fracture. More
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Published: 01 June 2019
Fig. 2 Bracket fractured by bending More
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Published: 01 June 2019
Fig. 1 The FTIR spectrum obtained on the bracket base material, exhibiting absorption bands characteristic of polycarbonate More
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Published: 01 June 2019
Fig. 1 Fatigue failure of clevis bracket. More
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Published: 01 June 2019
Fig. 2 Thin arm (#98) and bracket More
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Published: 01 June 2019
Fig. 3 Thick arm (#93) and bracket More
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Published: 01 June 2019
Fig. 12 Sketch of strain lines resulting from assembly of bracket to tower More
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Published: 01 June 2019
Fig. 1 An overall view of the submitted section of pipeline. Bracket a indicates the center region of the crack, and arrows c indicate cracks in the coating. More