The Nucleation and Growth of Cavities in Iron during Deformation at Elevated Temperatures

Cane, B. J.; Greenwood, G. W.

doi:10.1179/030634575790444405

Cited by 124 publications

(22 citation statements)

References 2 publications

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“…Very often flat, disk shaped cavities are observed. In a recent study of cavitation Cane and Greenwood (101) reported that the height of cavities that grew in the early stage stayed unchanged later in their evolution. This is clearly an indication of the transition of the growth mode from a quasi-equilibrium shape to a non-equilibrium one.…”

Section: Introductionmentioning

confidence: 99%

Creep cavitation in 304 stainless steel

Chen¹,

Argon²

1981

Acta Metallurgica

181

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A micromechanical analysis of deformation and fracture in creeping alloys is presented based on a mechanistic approach using continuum mechanics. The analysis was first carried out on a coarse microscopic level in which the self-consistent theory of Hill was employed to treat the steady state creep of heterogeneous alloys with coarse microstructures allowing for grain boundary sliding. Processes operating on a finer scale than the grain size such as grain boundary diffusion and surface diffusion were subsequently included in the analysis. It was found that the high stresses required for cavity nucleation occur at intergranular particles only in transients of grain boundary sliding, and that two modes of cavity growth result corresponding to rate control by each of the abovementioned diffusional processes.Creep cavitation in 304 stainless steel in the neighborhood of 0.5 Tm was studied experimentally to test these theoretical models. Our results suggest that a broad spectrum of interfacial energy may exist and that microstructural changes such as those caused by twins can alter cavitation behavior drastically. Cavities grow in most cases by grain boundary diffusion coupled with matrix creep, somewhat restricted by surface diffusion. However, the grain boundary sliding can be a dominant mode of cavity growth at high stresses and for large cavities.

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Section: Introductionmentioning

confidence: 99%

Creep cavitation in 304 stainless steel

Chen¹,

Argon²

1981

Acta Metallurgica

181

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“…These data suggest that grain boundary sliding is more important at lower stresses such that stress redistribution will occur leading to the observed results. We may conclude that the non-linear stress dependence of the cavity growth rate observed here and in reported work [12] is a consequence of stress redistribution at grain corners due to grain boundary sliding.…”

Section: B Effects Of Grain Boundary Orientationmentioning

confidence: 63%

The growth of grain boundary cavities under applied stress and internal pressure

Mancuso¹,

1979

Metall Trans A

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“…This is true even in cases where complete size distributions are available, such as small-angle neutron scattering. [19] Cane and Greenwood [17] and Cane [18] evaluated cavity growth in a-iron and Cr-Mo steels, respectively, by considering only the largest cavities of interrupted test specimens. Investigating fractured surfaces of crept samples in SEM, they could determine the maximum cavity width and length in the boundary plane as well as the cavity height.…”

Section: Introductionmentioning

confidence: 99%

“…Much information is available in the literature, [15][16][17][18][19][20][21][22][23] which is, however, rarely unambiguous. As pointed out by Cane and Greenwood, [17] the mean cavity size is not a satisfactory parameter for the study of cavity-growth kinetics due to continuous nucleation as well as the limited resolution of the experimental techniques. Continuous nucleation hinders, however, the direct interpretation of experimental data.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Microtomographic Characterization of Single-Cavity Growth During High-Temperature Creep of Leaded Brass

Isaac

Dzięcioł

Sket

et al. 2011

Metall Mater Trans A

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International audienceSynchrotron microtomography was used for in-situ characterization of high-temperature creep damage in leaded brass. Applying image registration to subsequent tomographic reconstructions, the volumetric growth rate of single cavities with equivalent radii between 2 and 4.3 mu m was assessed. We conclude from the volume dependence of the growth rates that both the viscous flow and grain boundary (GB) diffusion mechanisms influence void growth. We show that void growth in leaded brass is retarded by negative stress triaxiality, which develops in the matrix during heating the specimen to the deformation temperature

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The Nucleation and Growth of Cavities in Iron during Deformation at Elevated Temperatures

Cited by 124 publications

References 2 publications

Creep cavitation in 304 stainless steel

Creep cavitation in 304 stainless steel

The growth of grain boundary cavities under applied stress and internal pressure

In-Situ Microtomographic Characterization of Single-Cavity Growth During High-Temperature Creep of Leaded Brass

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