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dimpled intergranular fracture

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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
... dimples from microvoid coalescence around graphite nodules in a ductile iron (ASTM 65-40-10). Picture widths are approximately 0.2 mm (0.008 in.) from original magnifications of 500×. Courtesy of Mohan Chaudhari, Columbus Metallurgical Services Intergranular (IG) fracture is easily distinguishable...
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
... a case history on IG fracture of steam generator tubes, where a lowering of the operating temperature was proposed to reduce failures. dimpled intergranular fracture grain boundaries hydrogen embrittlement intergranular brittle cracking intergranular fatigue intergranular stress-corrosion...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006323
EISBN: 978-1-62708-179-5
... of the main fracture modes and their characteristic fractographic features. It discusses the four principal fracture modes: dimple rupture (or fracture), cleavage, fatigue, and intergranular fracture. The article provides information on special cases of environmentally assisted fracture. It concludes...
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
... which cracking or separation occurred. The distinction is the presence of MVC in the case of dimpled intergranular fracture and its absence in intergranular brittle fracture. In failure analysis, the investigator must distinguish which type of intergranular fracture has occurred, because the causes...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002349
EISBN: 978-1-62708-193-1
... or quasicleavage, and intergranular failure. Certain fundamental characteristics of fracture observed in precipitation-hardening alloys, ferrous alloys, titanium alloys are also discussed. cleavage fracture crack growth cracking creep dimpled rupture ductile striation formation failure analysis...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
... ) increased, the fracture surface changed from one characterized by large transgranular facets to one exhibiting intergranular facets and dimples. Crack growth direction is from left to right. Fig. 1103 , 1104 and 1105 : Fracture surface at low Δ K (<25 MPa m , or 23 ksi in. ) and da...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000617
EISBN: 978-1-62708-181-8
... fracture, grain boundaries, notch and fatigue precrack, dimpled rupture, and fatigue striations of these alloys. fractograph intergranular fracture nickel alloys Fig. 867 Surface of a fracture in a bend-test specimen of Nickel 201 containing 0.02% C, 0.35% Mn, 0.01% S, 0.35% Si, 0.25% Cu...
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
... Mark/Indication Implication Dimpled fracture surface Ductile overload fracture at this location Faceted fracture surface Brittle cleavage fracture Possible SCC fracture May be low Δ K fatigue Intergranular with smooth grain boundaries Likely either improper thermal...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... that exhibits various dimple sizes ( Fig. 2 ). When microvoids nucleate at the grain boundaries.( Fig. 3 ), intergranular dimple rupture results. Fig. 2 Examples of the dimple rupture mode of fracture. (a) Large and small dimples on the fracture surface of a martempered type 234 tool steel saw disk...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000619
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of copper alloys and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the following: fatigue fracture, intergranular fracture...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000612
EISBN: 978-1-62708-181-8
... view of a region of the fracture surface shown in Fig. 732 , revealing none of the intergranular rupture characteristic of hydrogen embrittlement, but showing the equiaxed dimples of tension overload. See Fig. 734 for enlarged view of outlined area. 4000× Fig. 734 Higher-magnification view...
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
... is uniquely characterized by dimpled fracture surfaces due to microvoid coalescence. Microscale brittle fractures are characterized by either cleavage (transgranular brittle fracture) or intergranular embrittlement. References 1. Ross R.J. and Boit C...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000601
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of pure irons and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the grain-boundary cavitation; slip lines; intergranular...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
.... This view provides a much clearer delineation of the fine details of the fracture surface and shows a combination of dimpled rupture and grain-boundary separation. Intergranular secondary fissures such as those marked by the arrows at A led to the formation of the vertical “cliffs” shown here (arrows at B...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
.... 559 An area of the fracture surface in which the fracture appears to be intergranular, with secondary cracks between the grains. The lower portion of the area may contain dimples. SEM, 100× Fig. 560 Another area of the fracture surface, shown at higher magnification. This area has many...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
... crack growth. Figure 5 shows a fracture in a highly stressed 4340 steel part. A narrow zone of corroded intergranular fracture at the surface of the part is adjoined by a zone of uncorroded intergranular fracture, which in turn is adjoined by a dimpled region. The part had been reworked to remove...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
.... A narrow zone of corroded intergranular fracture at the surface of the part is adjoined by a zone of uncorroded intergranular fracture, which in turn is adjoined by a dimpled region. The part had been reworked to remove general corrosion products shortly before fracture. It was concluded that the rework...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000624
EISBN: 978-1-62708-181-8
..., iron-base, molybdenum-base, and tantalum-base materials. The fractographs illustrate fatigue striations, slow-bending fracture, quasi-cleavage fracture, corrosion-fatigue fracture, fatigue crack, intergranular cleavage, microvoid coalescence, tension-overload fracture, crack propagation, impact...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... tested at 540 °C (1000 °F). A ductile-to-brittle transition occurred at very slow strain rates. Fig. 627 : Microvoid coalescence (dimpled rupture) on fracture surface of sample tested at strain rate of 1.3 mm/min (0.05 in./min). SEM, 200×. Fig. 628 : Brittle intergranular fracture surface of sample...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000613
EISBN: 978-1-62708-181-8
... cracking of discs for circular saw blades. Parts were made of a martempered low-alloy tool steel similar to type 234. Fig. 752 : Woody fracture surface of saw disc that broke when dropped. 13×. Fig. 753 : Fine and coarse dimples near the blade surface, in the decarburized zone. SEM, 2600×. Fig. 754...