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graphite flakes

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Image
Published: 01 December 1992
Fig. 6 Micrograph showing graphite flakes characteristic of gray cast iron. Unetched. 64×. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047315
EISBN: 978-1-62708-225-9
... the conclusions that brittle fracture of the flange from the body was the result of overload caused by misalignment between the flange and the roll holder. The microstructure contained graphite flakes of excessive size and inclusions in critical areas; however, these metallurgical imperfections did not appear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0090938
EISBN: 978-1-62708-221-1
... at a stiffening rib exhibited brittle features. (c) Longitudinal metallographic cross section showing secondary brittle cracking along the graphite flakes. 2% nital etch. 59× Tensile specimens from both halves exhibited ultimate tensile strengths exceeding 205 MPa (30 ksi). Although testing of samples...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091384
EISBN: 978-1-62708-219-8
... ). This is indicative of graphitic corrosion. Graphitic corrosion occurs as the ferritic phase is leached from the matrix leaving a porous mass of graphite flakes ( Fig. 1d ). The structure of the material was typical of gray cast iron with random orientation of the graphite flakes. Indications of graphitic corrosion...
Image
Published: 01 December 1992
Fig. 11 Photomicrograph of the crack near the tip. The crack propagated along a graphite flake, which caused it to change direction. Nital etch. 172.5×. More
Image
Published: 01 January 2002
was observed on the outside diameter surface. Original micrograph image shows an area 16.5 mm (0.65 in.) wide. (d) Micrograph of crack surface in (c) depicting graphitic corrosion surrounding the graphite flakes. Original micrograph image shows an area 1.14 mm (0.045 in.) wide. Courtesy of S.R. Freeman More
Image
Published: 01 June 2019
was observed on the outside diameter surface. Original micrograph image shows an area 16.5 mm (0.65 in.) wide. (d) Micrograph of crack surface in (c) depicting graphitic corrosion surrounding the graphite flakes. Original micrograph image shows an area 1.14 mm (0.045 in.) wide. Courtesy of S.R. Freeman More
Image
Published: 15 January 2021
were observed on the outside diameter surface. Original micrograph image shows an area 16.5 mm (0.65 in.) wide. (d) Micrograph of crack surface in (c) depicting graphitic corrosion surrounding the graphite flakes. Original micrograph image shows an area 1.14 mm (0.045 in.) wide. Courtesy of S.R More
Image
Published: 01 June 2019
Fig. 1 Cracking in a truck transmission housing. (a) A typical crack at a stiffening rib. (b) An opened crack at a stiffening rib exhibited brittle features. (c) Longitudinal metallographic cross section showing secondary brittle cracking along the graphite flakes. 2% nital etch. 59× More
Image
Published: 01 January 2002
Fig. 5 Cracking in a truck transmission housing ( example 3 ). (a) A typical crack at a stiffening rib. (b) An opened crack at a stiffening rib exhibited brittle features. (c) Longitudinal metallographic cross section showing secondary brittle cracking along the graphite flakes. 2% nital etch More
Image
Published: 15 January 2021
Fig. 5 Cracking in a truck transmission housing (Example 3). (a) Typical crack at a stiffening rib. (b) An opened crack at a stiffening rib exhibited brittle features. (c) Longitudinal metallographic cross section showing secondary brittle cracking along the graphite flakes. 2% nital etch More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001050
EISBN: 978-1-62708-214-3
... flakes in an iron matrix, typical of gray cast iron. Etching in 2% nital revealed a bainite matrix with scattered massive carbides ( Fig. 7 ). Fig. 6 Micrograph showing graphite flakes characteristic of gray cast iron. Unetched. 64×. Fig. 7 Micrograph of the same area shown in Fig. 6...
Image
Published: 01 June 2019
graphite flakes (arrow A), manganese sulfide inclusions (arrow B), and silicate inclusions (arrow C). Etched with nital. 150× More
Image
Published: 01 June 2019
Fig. 2 Optical micrograph showing typical flake graphite morphology in the shell region of roll sample HSM #4; magnification 100× More
Image
Published: 01 June 2019
Fig. 3 Structure of first crankcase, etch: Picral. 200 × Normal flake graphite More
Image
Published: 01 December 1993
Fig. 7 Micrograph showing flake graphite observed in the fractured sample. Unetched. 62× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001200
EISBN: 978-1-62708-221-1
... Abstract During the operation of tractors with cantilevered body, the lateral wall of the hypoeutectic cast iron cylinder blocks cracked repeatedly. Three of the blocks were examined. The grain structure of the thick-walled part consisted of uniformly distributed graphite of medium flake size...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0047220
EISBN: 978-1-62708-220-4
... well-shaped nodules of graphite generally surrounded by ferrite envelopes. The gray iron exhibited a pearlitic matrix containing type A graphite flakes. There were no metallurgical causes of failure other than the inherent brittleness of gray iron, and there was no evidence of machining imperfections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047263
EISBN: 978-1-62708-218-1
... consisted of type A size 4 flake graphite in a matrix of pearlite with small amounts of ferrite. this evidence supported the conclusion that the cylinder-head failure resulted from the presence of a casting defect (shrinkage) on the No. 7 cylinder exhaust-port wall interconnecting the water jacket...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089526
EISBN: 978-1-62708-218-1
.... There was no indication of microporosity in the specimen taken from the rocker-arm rail. The microstructures consist of predominantly types A and B graphite, flake size 4 to 6, in a matrix of medium-to-fine lamellar pearlite. The specimen taken near the No. 3 intake port has a higher-than-usual amount of free ferrite...