Overview No. 1

Goods, S.H.; Brown, L. M.

doi:10.1016/0001-6160(79)90051-8

Cited by 737 publications

(133 citation statements)

References 32 publications

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“…Normally coarsened precipitates can cause creep property deterioration by decreasing the effects of solid solution strengthening and precipitation strengthening. In addition, the phenomenon that many large precipitates were observed inside creep voids implied that the precipitates also played an important role as nucleation sites of Goods et al 15) have found that cavities are usually associated with inclusions or second phase particles. A cavity can be induced by particle fracture or by separation of the particle/matrix interface.…”

Section: Relationship Between Precipitate and Ccreep Voidmentioning

confidence: 99%

Analysis of Degradation of Creep Strength in Heat-affected Zone of Weldment of High Cr Heat-resisting Steels Based on Void Observation.

Shinozaki

Kuroki

et al. 2002

ISIJ International

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Section: Relationship Between Precipitate and Ccreep Voidmentioning

confidence: 99%

Analysis of Degradation of Creep Strength in Heat-affected Zone of Weldment of High Cr Heat-resisting Steels Based on Void Observation.

Shinozaki

Kuroki

et al. 2002

ISIJ International

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“…While most of the historic studies associated cavity formation with decohesion at particles or inclusions, [3][4][5] similar voids were also found in pure metals. [2,6] Two early reviews of ductile failure processes provide additional details on early observations: a 1968 review by Rosenfield [7] and a 1979 review by Goods and Brown [6] . Shortly thereafter, Wilsdorf provided a seminal review which focused on microstructural aspects of ductile failure.…”

Section: Introductionmentioning

confidence: 99%

“…Ductile dimples are typically hemispherical in nature. [2,6] However, in tantalum, a series of elongated ridgelines and valleys form in the fracture surface. The ridgelines typically range from 10 to 50 lm long, much larger than typical ductile dimples.…”

Section: Introductionmentioning

confidence: 99%

The Morphology of Tensile Failure in Tantalum

Boyce

Clark

et al. 2013

Metall Mater Trans A

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The deformation, crack nucleation, coalescence, and rupture process of pure tantalum (99.9 pct) were studied under room temperature quasistatic loading using several in situ and ex-situ techniques including optical metallography, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission-electron microscopy (TEM). The fracture surface of tantalum forms a ridge-and-valley morphology that is distinct from conventional notions of ductile dimple microvoid coalescence, and also distinct from spall damage formed during dynamic shock conditions. Failure proceeds by void nucleation at a dislocation cell wall or in subgrain interiors. Coalescence appears to involve a two-stage damage progression: first individual voids coalesce along the tensile axis forming diamond-shaped multivoid cavities; then cavities link-up by intercavity necking. Final rupture occurs when the intercavity necks thin tõ 100-nm films and fail by crystallographic cleavage. This final tearing process was observed using in situ TEM tensile deformation of a thin tantalum film. The detailed microstructural and morphological observations of the current study can be used to guide the development of improved models for tearing of ductile metals.

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“…Nucleation of voids in materials occurs generally at second phase particles or at inclusions. Goods and Brown [3] developed a dislocation-based model of void nucleation. According to them, when the total stress (summation of local stress, flow stress and hydrostatic stress) exceeds the interfacial bond strength, the voids nucleate.…”

Section: Introductionmentioning

confidence: 99%

Micro void coalescence of ductile fracture in mild steel during tensile straining

Pradhan¹,

Robi²,

Roy³

2011

Frattura Ed Integrità Strutturale

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ABSTRACT. The ductile fracture occurs mainly in three stages i.e. void nucleation, void growth and the void coalescence. The present work focuses on the study the coalescence of existing micro void in a ductile material, mild steel. The specimen with holes in square array at various angle to load axis have been tested. The holes were machined in the specimen and assuming those hole as the voids. The growth and coalescence behaviours during tensile straining were observed both in macro and micro levels. Since the existing facility is not adequate to make hole size in micron, this work has been carried out by making hole upto 500 micron. The results are compared with other specimen with bigger size hole and without any hole. Also the effects of micro voids (present in the material) on the progress of crack have been studied. It is found that with same amount of voids, present in different positions, the mechanical properties of the material are altered.

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Overview No. 1

Cited by 737 publications

References 32 publications

Analysis of Degradation of Creep Strength in Heat-affected Zone of Weldment of High Cr Heat-resisting Steels Based on Void Observation.

Analysis of Degradation of Creep Strength in Heat-affected Zone of Weldment of High Cr Heat-resisting Steels Based on Void Observation.

The Morphology of Tensile Failure in Tantalum

Micro void coalescence of ductile fracture in mild steel during tensile straining

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