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dimpled intergranular fracture

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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 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 January 1987
Fig. 74 Effect of temperature on double-aged Inconel X-750 that was tested at a nominal strain rate of 3 × 10 −5 s −1 . (a) and (b) The fracture at room temperature occurs by intergranular dimple rupture. Note the evidence of dimple rupture network on the intergranular walls. (c) and (d More
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...
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Published: 01 January 1996
Fig. 1 Crack propagation mechanisms: (a) Cleavage crack propagation. (b) Dimple fracture due to coarse particles. (c) Dimple fracture due to fine particles. (d) Dimple fracture due to coarse and fine particles. (e) Intergranular crack propagation due to grain boundary precipitates. (f More
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Published: 01 January 1996
Fig. 1 Crack propagation mechanisms: (a) cleavage crack propagation. (b) Dimple fracture due to coarse particles. (c) Dimple fracture due to fine particles. (d) Dimple fracture due to coarse and fine particles. (e) Intergranular crack propagation due to grain boundary precipitates. (f More
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
.... SEM, 600× Fig. 906 Tensile-overload fracture in a fracture-toughness specimen of 64Cu-27Ni-9Fe alloy that underwent spinodal decomposition during heat treatment for 10 h at 775 °C (1425 °F). The surface contains many intergranular facets with intervening regions of dimpled transgranular...
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Published: 01 January 2003
Fig. 9 Ductile and brittle fracture morphologies resulting from LMIE. (a) Fracture surface produced by subcritical cracking in D-6ac steel (tempered at 650 °C, or 1200 °F) in liquid mercury showing predominantly dimpled intercrystalline fracture along prior-austenite grain boundaries. (b More
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Published: 01 January 1987
Fig. 76 Intergranular dimple rupture in a Ti-6Al-2Nb-1Ta-0.8Ta alloy tested at 800 °F (1470 °F). The fracture path in this alloy, tensile tested at a strain rate of about 3.3 × 10 −4 s −1 , changes at 800 °C (1470 °F) from a predominantly transgranular dimple at room temperature (not shown More
Image
Published: 01 January 1987
Fig. 75 Effect of test temperature on the fracture of Haynes 556, which was tensile tested at a strain rate of 1 s −1 at increasing temperature. (a) Dimple rupture fracture at 1015 °C (1860 °F). At the bottom of many of the dimples are TaC inclusions, which initiated microvoid coalescence. (b More
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: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
... ( da / dN ) and stress-intensity factor (Δ K ) 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...
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
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.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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... surface) • Microvoids (dimples) elongated in direction of loading • Single crack with no branching • Surface slip band emergence • Cleavage or intergranular fracture • Origin area may contain an imperfection or stress concentrator • Progressive zone: worn appearance, flat, may show striations...
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
... cycle produce a fracture surface 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...
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Published: 01 January 2002
Fig. 6 Intergranular separation in an area of the surface of the hydrogen embrittlement fracture of the type 431 stainless steel mushroom-head closure of Fig. 4 and 5 . When viewed in three-dimension, the somewhat rounded separated-grain surfaces show cavities akin to dimples in appearance More
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Published: 15 January 2021
Fig. 6 Intergranular separation in an area of the surface of the hydrogen embrittlement fracture of the type 431 stainless steel mushroom-head closure of Fig. 4 and 5 . When viewed in three dimension, the somewhat rounded separated-grain surfaces show cavities akin to dimples in appearance More
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Published: 09 June 2014
Fig. 30 Fracture origin surface of the furnace-tempered shaft. The fracture mode is intergranular, with some dimple-rupture-type fracture, which would be considered normal. Source: Ref 43 More