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Book Chapter

By E.R. Weishaupt
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
... Abstract This article briefly reviews the factors that influence the occurrence of intergranular (IG) fractures. Because the appearance of IG fractures is often very similar, the principal focus is placed on the various metallurgical or environmental factors that cause grain boundaries...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
... power generation Steam generators Tubes Inconel 600 UNS N06600 Intergranular fracture Power plants use steam generators, which have hot reactor coolant water flowing through the generators. One power plant experienced a steam generator tube rupture in the early 1990s. Metallurgical evaluation...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047579
EISBN: 978-1-62708-234-1
... separation under subsequent loading. The studs fractured under service loads as a result of intergranular crack propagation in the HAZ. Rapid heating and cooling during attachment welding produced a martensitic structure in the HAZ of the stud, which cracked circumferentially from the combination of thermal...
Book Chapter

By S. Lampman
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
... Abstract This article briefly reviews the various metallurgical or environmental factors that cause a weakening of the grain boundaries and, in turn, influence the occurrence of intergranular (IG) fractures. It discusses the mechanisms of IG fractures, including the dimpled IG fracture, the IG...
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Published: 01 December 2019
Fig. 3 Detail of a fracture origin, showing intergranular fracture and decreasing grain size inward from the surface More
Image
Published: 01 January 2002
Fig. 2 SEM images of intergranular fracture with different grain morphologies. (a) Rock candy appearance from atmospheric stress-corrosion cracking of a high-strength aluminum alloy with equiaxed grains. 130×. (b) Intergranular fracture along the part line of an aluminum forging More
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Published: 01 January 2002
Fig. 11 Mud cracks on the surface of an intergranular fracture in 7079-T651 aluminum that failed under SCC conditions in a 3.5% chloride solution. TEM replica More
Image
Published: 30 August 2021
Fig. 35 Scanning electron microscopy image of intergranular fracture-surface morphology within the origin region More
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Published: 30 August 2021
Fig. 16 Scanning electron microscopy micrograph showing an intergranular fracture surface on an embrittled surgical tool. Corrosion pitting on adjacent surfaces (white arrows) was the source for monoatomic hydrogen that resulted in embrittlement. More
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Published: 01 December 1993
Fig. 3 SEM of Zone 1 showing intergranular fracture surface with a covering of black oxide. 1000× More
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Published: 01 December 1993
Fig. 4 Electron micrograph showing the brittle intergranular fracture surface. Carbides and inclusions are present on the fracture. 1260×. More
Image
Published: 01 December 1992
Fig. 4 Scanning electron micrograph showing primarily intergranular fracture morphology. 75×. More
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Published: 01 December 1992
Fig. 2 Scanning electron micrograph showing the intergranular fracture from a singular, nonbranching crack. More
Image
Published: 01 December 1992
Fig. 4 SEM micrograph showing an intergranular fracture mode, observed around the entire circumference of both fractures in the screw. Structure at top is the base metal; structure at bottom is cadmium plating. 1000×. More
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Published: 01 December 1992
Fig. 3 Scanning electron fractograph showing intergranular fracture path along the elongated grain boundaries. More
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Published: 01 December 1993
Fig. 5 SEM micrograph showing intergranular fracture morphology of a prematurely failed disc. 630× More
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Published: 01 June 2019
Fig. 2 SEM micrograph showing intergranular fracture along prior-austenite grain boundaries at fracture-initiation site in ultrahigh-strength steel dragline bucket tooth. 200× More
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Published: 01 June 2019
Fig. 2 SEM micrograph showing intergranular fracture along prior-austenite grain boundaries at fracture-initiation site in ultrahigh-strength steel dragline bucket tooth. 200x More
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Published: 01 June 2019
Fig. 4 EPMA spectrum obtained from a contaminated intergranular fracture area on the bend of a failed Inconel 600 bellows. More
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Published: 01 June 2019
Fig. 12 SEM image of intergranular fracture surface from secondary crack. 50× More