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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
... and microscopic and metallographic examination) supported the conclusion that both hinge tabs on the clamp half fractured in a brittle manner as the result of gross overheating, or burning, during forging. The mechanical properties of the metal, especially toughness and ductility, were greatly reduced by burning...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001408
EISBN: 978-1-62708-220-4
... Abstract Initially, two vertical double-acting two-stage compressors delivering chlorine gas at a pressure of 100 psi appeared to be running satisfactorily. About six months later the LP piston-rod of the No. 2 compressor failed due to burning, the compressor being worked double-acting...
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Published: 01 June 2019
Fig. 1 Surface burning that initiated fracture in the web of a crane-bridge wheel forged from 1055 steel. Etched with 2% nital. Approximately 35x More
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Published: 30 August 2021
Fig. 10 Example of overheating and burning of forgings (a) black oxide from overheating of copper forging heated to 1023 °C (1875 °F) (b) Burning (black outlines) at grain boundaries of copper forging heated to 1065 °C (1950 °F) More
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Published: 30 August 2021
Fig. 28 Effect of burning on ductility in a 7075 aluminum alloy. (a) Properly heated. (b) Embrittled due to liquid phases formed in grain boundary. Profile of fracture surface of tensile specimens pulled to failure More
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Published: 30 August 2021
Fig. 43 Surface burning that initiated fracture in the web of a crane-bridge wheel forged from grade 1055 steel. 2% nital etch. Original magnification: ~35× More
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Published: 01 June 2019
Fig. 3 Grinding burn area (hard, brittle white layer of untempered martensite; Rc 54 to 56) and microcracks (arrows) on fillet surface near fatigue origin. Magnification 75 times; 2 pct nital etch. More
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Published: 01 June 2019
Fig. 7 Grinding burn zone consists of untempered martensite. Magnification 100 times; 2 pct nital. More
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Published: 01 June 2019
Fig. 6 Burn-through Failures (B-52 Chamber). More
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Published: 01 June 2019
Fig. 7 Burn-through Failures (F-111 Chamber). More
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Published: 01 December 2019
Fig. 5 Burned away cone plate and baffle, also showing deposits on the quench lines. The cone plate that should be in the upper right-hand part of the photograph is burned away, exposing the castable refractory that was above it. Notice the material build-up on the water-cooled quench lines More
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Published: 01 December 2019
Fig. 22 Oxidized and burned cone material More
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Published: 30 August 2021
Fig. 21 Oxidized and burned 1¼Cr-½Mo material More
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Published: 01 December 1992
Fig. 8 Typical machining burn in fastener hole. 212×. More
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Published: 01 December 1992
Fig. 3 Closeup view of jagged (burned) edge, showing effects of thermal fatigue. Note river bed type cracks on surface. More
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Published: 30 August 2021
Fig. 41 Burned-off journal stub. The short, rough stub indicates high heat over a short time period and is associated with an inner cone failure More
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Published: 30 August 2021
Fig. 42 Burned-off journal stub. The long, thinned-out journal indicates that the bearing was hot over a long time period and is associated with an outer cone failure More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046028
EISBN: 978-1-62708-235-8
... showed a brittle appearance at the fractures. Micrograph examination of an etched section disclosed several small cracks. Fracture of the parts may have occurred through similar cracks. Also observed was a burned layer approximately 0.075 mm (0.003 in.) deep on the latch surface, and hardness at a depth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048099
EISBN: 978-1-62708-235-8
... Abstract A bridge wheel on a crane, forged from 1055 steel, fractured after one year of service. The wheel fractured in the web between the hub and the rim. A small area containing beach marks that originated in a heavily burned area on the web surface was revealed by visual examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001145
EISBN: 978-1-62708-217-4
... Abstract Cartridge-pneumatic starter systems are used on military aircraft. In the cartridge mode used for alert starts, the starter turbine is driven by hot gases produced through the controlled burning of a solid propellant cartridge within a closed chamber (the breech chamber/cartridge...