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Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090466
EISBN: 978-1-62708-218-1
... Abstract A production lot of mechanical hinges used in an automotive application had failed during incoming quality-control routine actuation testing. A change in part supplier had taken place between the approval of the prototype parts that performed acceptably and the receipt of the first lot...
Book Chapter

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...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006448
EISBN: 978-1-62708-217-4
... Abstract Three wing flap hinge bearings were received by the laboratory for analysis. The bearings were fabricated from chromium-plated type 440C martensitic stainless steel. The intergranular fracture pattern seen in the electron fractographs, coupled with the corrosion pits observed...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006444
EISBN: 978-1-62708-217-4
... Abstract Helicopter rotor blade components that included the horizontal hinge pin, the associated nut, and the locking washer were examined. Visual examination of the submitted parts revealed that the hinge pin, fabricated from 4340 steel, was broken and that the fracture face showed a flat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047176
EISBN: 978-1-62708-235-8
... Abstract A ring clamp (8740 (AMS 6322), steel forged and cadmium plated) used for attaching ducts to an aircraft engine became loose after three hours of service. When the clamp was removed from the engine, the hinge tabs on one clamp half were found to be broken. Analysis (visual inspection...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001544
EISBN: 978-1-62708-219-8
... Abstract A large crack developed at a girder-truss joint area of the Fremont bridge in Portland, OR, on 28 Oct 1971. It occurred during a positioning procedure involving a junction piece welded to a girder, starting as a brittle fracture and terminating in plastic hinges in the girder web welds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048498
EISBN: 978-1-62708-234-1
... Abstract A graphite-epoxy tapered-box structure, which consisted of two honeycomb skin panels fastened to a spanwise spar with intermediate chordwise ribs, fractured during testing. Hinge-line deflection of the front spar was revealed. Through-thickness cracks in the forward and trailing edges...
Image
Published: 01 January 2002
Fig. 37 Aluminum alloy 2014-T6 hinge bracket that failed by SCC in service. (a) Hinge bracket. Actual size. Arrow indicates crack. (b) Micrograph showing secondary cracking adjacent and parallel to the fracture surface. Etched with Keller's reagent. 250× More
Image
Published: 30 August 2021
Fig. 20 Optical microscopy image of fracture surfaces of a knee implant hinge post, which fractured in vivo More
Image
Published: 30 August 2021
Fig. 21 Optical microscopy images of the subject hinge post fragment fracture surfaces, with beach marks clearly evident More
Image
Published: 30 August 2021
Fig. 23 Scanning electron microscopy image of the subject hinge post posterior internal threads indicating significant wear caused by component looseness More
Image
Published: 30 August 2021
Fig. 6 Diagram of the elevator hinge pin assembly More
Image
Published: 01 June 2019
Fig. 1 Cracked type 440C stainless steel (a) aircraft wing flap hinge bearings. (b) Crack configuration of bearing 1 from (a). (c) Crack configuration of bearing 2 from (a). (d) Fracture surface of second crack in bearing 1. Arrow shows the probable fracture origin. 2.5x. (e) Fracture surface More
Image
Published: 01 June 2019
Fig. 1 Aluminum alloy 2014-T6 hinge bracket that failed by SCC in service. (a) Hinge bracket. Actual size. Arrow indicates crack. (b) Micrograph showing secondary cracking adjacent and parallel to the fracture surface. Etched with Keller's reagent. 250× More
Image
Published: 01 June 2019
Fig. 4 Fractured retaining bolt. The hinge pin is shown in the top of the figure. More
Image
Published: 15 January 2021
Fig. 48 (a) Photograph of an aluminum alloy 2014-T6 hinge bracket. Arrow indicates crack location. (b) Micrograph of a cross section prepared through the fracture surface. Arrows indicate stress-corrosion cracking. Original magnification: 250× More
Image
Published: 01 June 2019
Fig. 2 The crack in each web terminated in a plastic hinge. Note paint flaking in area at tip of crack. More
Image
Published: 01 June 2019
Fig. 1 Corrosion fatigue of a 4340 steel helicopter rotor assembly. (a) Horizontal hinge pin. (b) Nut. (c) Locking washers. (d) and (e) Views of the hinge pin fracture surface. A beach mark is visible in (e). (f) Dent on one of the threaded surfaces of the horizontal hinge pin. (g) Corrosion More
Image
Published: 01 January 2002
Fig. 41 Scanning electron images showing (a) brittle fracture features on the failed hinge and (b) ductile fracture features on the laboratory fracture. 118× More
Image
Published: 01 June 2019
Fig. 1 Scanning electron images showing (a) brittle fracture features on the failed hinge and (b) ductile fracture features on the laboratory fracture. 118× More