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brittle transgranular fracture

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Published: 01 December 1992
Fig. 2 Brittle transgranular fracture surface crack produced by inservice failure. More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... of a component of interest in a failure investigation. Details on the mechanisms of deformation, brittle transgranular fracture, intergranular fracture, fatigue fracture, and environmentally affected fracture are also provided. brittle transgranular fracture creep fracture deformation ductile fracture...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001372
EISBN: 978-1-62708-215-0
... that the fracture was brittle and was initiated by an intergranular cracking mechanism. The mode of fracture outside the crack initiation zone was transgranular cleavage. No indication of fatigue was found. The failure was attributed to improper heat treatment during manufacture, which resulted in a brittle...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045988
EISBN: 978-1-62708-235-8
... Grain size Hardness 410 UNS S41000 Heat treating-related failures Transgranular fracture Brittle fracture The clamp-strap assembly shown in Fig. 1 , which was used for securing the caging mechanism on a star-tracking telescope, fractured during installation. In installation, the clamp ends...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090971
EISBN: 978-1-62708-222-8
.... No recommendations were made. Adapters Inclusions Snowthrowers ZA-27 UNS Z35840 Brittle fracture Transgranular fracture A die-cast zinc adapter used in a snowthrower application failed catastrophically in a brittle overload manner. The mechanical properties and alloy designation were not specified...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001100
EISBN: 978-1-62708-214-3
... analysis revealed dark thumbnail regions at the fracture origins and a very narrow and uniform shear lip. The thumbnail region exhibited zinc deposits with no apparent fracture detail, indicating preexisting cracks that had occurred before galvanizing. The balance of the fracture exhibited a transgranular...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... in a ductile-brittle sequence. Microscale ductile versus brittle fracture: Microscale ductile fracture is uniquely characterized by dimpled fracture surfaces due to microvoid coalescence. Microscale brittle fractures are characterized by either cleavage (transgranular brittle fracture) or intergranular...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
... were metallographically examined to be typical for brittle steel fracture and associated with the circumferential weld that joined the flange forging to the first shell section. Featureless facets in the HAZ were observed and were revealed to be the fracture-initiation sites. Pronounced banding...
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
... (visual inspection, tensile testing, 2% nital etched 59x cross sections, and metallographic analysis) supported the conclusion that failure was due to applied stresses sufficient to fracture the castings which exhibited brittle overload cracks at highly stressed locations. No recommendations were made...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c9001567
EISBN: 978-1-62708-230-3
... extended radially from the electric resistant weld into the base metal. Metallographic examination revealed the cracks were transgranular and branching, characteristic of SCC in austenitic stainless steels. The fracture surfaces had a brittle cleavage-like appearance, typical of SCC in austenitic stainless...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... also observed, as noted in Fig. 6 . This type of crack growth, along with the observed secondary cracking, is indicative of unstable brittle rupture and a rapid release of stored strain energy. While transgranular cleavage has been identified as a fracture mechanism related to hydrogen damage, 5...
Image
Published: 01 December 1992
Fig. 9 SEM fractograph of the fracture surface of the carrier shaft base material. The fracture mode was fast running, transgranular, brittle cleavage. 630×. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001436
EISBN: 978-1-62708-235-8
... was broken off with hammer blows. The fracture surface was duplex in nature, there being an annular region surrounding a central zone, which suggests that the fracture developed in two stages. Microscopic examination confirmed that the fracture was of the brittle type. The shaft material showed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... and corrosion had occurred simultaneously ( Fig. 2 ). During final crack propagation, the dominant process was mechanical fatigue. Fig. 2 Brittle transgranular fracture surface crack produced by inservice failure. Metallography Microstructural Analysis The microstructure of the pipe is shown...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... of transgranular fracture are fatigue, brittle cracking by cleavage, or ductile fracture by microvoid coalescence. In contrast, IG fracture is not a unique fracture process: it is just a preferential crack path where brittle, ductile, or fatigue cracking may occur at the grain boundaries by various time...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001088
EISBN: 978-1-62708-214-3
... Transgranular fracture Weld defects Welded joints 1018 UNS G10180 Joining-related failures Brittle fracture Intergranular fracture Background A 25 mm (1 in.) diam carrier shaft failed suddenly during operation. Circumstances Leading to Failure The shaft failed near the toe of the 4.8 mm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0089663
EISBN: 978-1-62708-229-7
... in (b) and (c); a transgranular mode, typical of corrosion fatigue, is shown in (d). The fractograph in (e) was taken in the region of crack arrest and indicates an intergranular mode of fracture. Metallographic Examination An examination of the microstructure revealed a concentration...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... of the infrequently encountered term “intragranular” to describe transgranular features is discouraged due to its similarity in pronunciation to intergranular. All brittle fracture mechanisms can exhibit chevron or herringbone patterns that indicate the fracture origin and direction of rapid fracture progression...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
.... The mechanisms of transgranular fracture are fatigue, brittle cracking by cleavage, or ductile fracture by microvoid coalescence. In contrast, IG fracture is not a unique fracture process; it is just a preferential crack path where brittle, ductile, or fatigue cracking may occur due to the weakening of grain...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... at magnifications above 500× • Overload zone: may be either ductile or brittle • Multiple intergranular fissures covered with reaction scale • Grain faces may show porosity Metallographic inspection, 50–1000× (cross section) • Grain distortion and flow near fracture • Irregular, transgranular fracture...