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dimple rupture
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Image
Published: 31 August 2017
Fig. 5 Examples of the dimple rupture mode of fracture. (a) Large and small dimples on the fracture surface of a martensitic type 234 tool steel saw disk. The extremely small dimples at top left are nucleated by numerous closely spaced particles. (b) Large and small sulfide inclusions in steel
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Image
Published: 01 January 1987
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. The extremely small dimples at top left are nucieated by numerous, closely spaced particles. (D.-W. Huang, Fuxin Mining Institute, and C.R
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Image
Published: 01 January 1996
Fig. 18 SEM fractograph for type 304 aged at 566 °C. Transgranular dimple rupture is dominant, but limited intergranular cracking (denoted by arrows) is also observed. Source: Ref 94
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Image
Published: 01 January 2002
Fig. 1 SEM images of dimple-rupture fractures. (a) Fracture of low-alloy medium-carbon steel bolt (SAE grade 5). 1750×. (b) Equiaxed tensile dimples originating around the graphite nodules of ASTM 60-45-10 ductile iron. 350×. (c) Parabolic shear dimples in cast Ti-6Al-4V from torsional loading
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Image
Published: 01 January 1987
Fig. 3 Intergranular dimple rupture in a steel specimen resulting from microvoid coalescence at grain boundaries.
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Image
Published: 01 January 1987
Fig. 62 Effect of balanced biaxial tension on dimple rupture in a hot-rolled basal-textured Ti-6Al-4V alloy. The dimples on the biaxially fractured specimen (b) are smaller and more shallow when compared to the uniaxially fractured specimen (b). Source: Ref 196
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Image
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
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Image
Published: 01 January 1987
Fig. 78 Effect of a 15-min 800- °C (1470- °F) air exposure on a dimple rupture fracture surface of an annealed Ti-6Al-6V-2Sn alloy. (a) Fracture appearance before exposure. (b) The identical fracture surface after exposure. The oxide buildup is so great that it is impossible to identify
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Image
Published: 15 January 2021
Fig. 1 Scanning electron microscopy images of dimple-rupture fractures. (a) Fracture of low-alloy medium-carbon steel bolt (SAE grade 5). Original magnification: 1750×. (b) Equiaxed tensile dimples originating around the graphite nodules of ASTM 60-45-10 ductile iron. Original magnification
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Image
Published: 01 January 2005
Fig. 11 Stages in the dimpled rupture mode of ductile fracture. (a) Void initiation at hard particles. (b) Void growth. (c) Void linking
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Image
Published: 01 January 2005
Fig. 14 Stages in the dimpled rupture mode of ductile fracture. (a) Void initiation at hard particles. (b) Void growth. (c) Void linking
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Image
Published: 01 January 2002
Fig. 9 Dimpled rupture created by microvoid coalescence in a quenched and tempered steel. Note the presence of carbide particles in the bottom of several dimples. Palladium shadowed two-stage carbon replica. Because the image is a replica of the fracture surface, there is a reversal
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Image
Published: 15 January 2021
Fig. 10 Dimpled rupture created by microvoid coalescence. Courtesy of Engineering Systems, Inc.
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Book: Fractography
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
... Abstract This article begins with a discussion of the basic fracture modes, including dimple ruptures, cleavages, fatigue fractures, and decohesive ruptures, and of the important mechanisms involved in the fracture process. It then describes the principal effects of the external environment...
Abstract
This article begins with a discussion of the basic fracture modes, including dimple ruptures, cleavages, fatigue fractures, and decohesive ruptures, and of the important mechanisms involved in the fracture process. It then describes the principal effects of the external environment that significantly affect the fracture propagation rate and fracture appearance. The external environment includes hydrogen, corrosive media, low-melting metals, state of stress, strain rate, and temperature. The mechanism of stress-corrosion cracking in metals such as steels, aluminum, brass, and titanium alloys, when exposed to a corrosive environment under stress, is also reviewed. The final section of the article describes and shows fractographs that illustrate the influence of metallurgical discontinuities such as laps, seams, cold shuts, porosity, inclusions, segregation, and unfavorable grain flow in forgings and how these discontinuities affect fracture initiation, propagation, and the features of fracture surfaces.
Book Chapter
Book: Fractography
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...
Abstract
This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of nickel alloys and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the fatigue crack, transgranular cleavage, intergranular fracture, grain boundaries, notch and fatigue precrack, dimpled rupture, and fatigue striations of these alloys.
Book Chapter
Book: Fractography
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
... fracture, crack propagation, ductile overload fracture, dimpled rupture, microvoid coalescence, and quasi-cleavage fracture of these alloys. cleavage fracture ductile fracture fatigue crack growth fatigue fracture fractograph stress-corrosion cracking tensile fracture threaded fasteners...
Abstract
This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of titanium alloys and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the fracture surface, fatigue crack growth, intergranular fracture, crack propagation, ductile overload fracture, dimpled rupture, microvoid coalescence, and quasi-cleavage fracture of these alloys.
Book: Fatigue and Fracture
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
... the cause of cracking or crack growth. This article discusses the macroscopic and microscopic basis of understanding and modeling fracture resistance of metals. It describes the four major types of failure modes in engineering alloys, namely, dimpled rupture, ductile striation formation, cleavage...
Abstract
The cracking process occurs slowly over the service life from various crack growth mechanisms such as fatigue, stress-corrosion cracking, creep, and hydrogen-induced cracking. Each of these mechanisms has certain characteristic features that are used in failure analysis to determine the cause of cracking or crack growth. This article discusses the macroscopic and microscopic basis of understanding and modeling fracture resistance of metals. It describes the four major types of failure modes in engineering alloys, namely, dimpled rupture, ductile striation formation, cleavage or quasicleavage, and intergranular failure. Certain fundamental characteristics of fracture observed in precipitation-hardening alloys, ferrous alloys, titanium alloys are also discussed.
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...
Abstract
As cast iron parts are extensively applied, fracture events will eventually take place. Consequently, it becomes essential to carry out failure analyses to identify the cause of fracture and to provide corrective actions that allow safe operation. This article presents a description 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 with a description of fractographic analyses for identifying the direction of propagation of a crack.
Image
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
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Image
Published: 01 January 1987
Fig. 731 View of the fracture surface in the fast-fracture region in Fig. 729 , showing basically equiaxed dimpled rupture, but also containing scattered features of quasi-cleavage. Some of the regions display heavy concentrations of extremely small dimples. SEM, 4000×
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