Journal ArticleDOI
Nucleation of cavities at second phase particles in grain boundaries
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TLDR
In this paper, a kinetic approach is used to explain the nucleation of cavities in grain boundaries at elevated temperature, under the influence of a tensile stress, vacancies cluster together and form cavities.About:
This article is published in Acta Metallurgica.The article was published on 1978-06-01. It has received 237 citations till now. The article focuses on the topics: Nucleation & Grain boundary strengthening.read more
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Effect of Carbon on Stress-Relief Cracking Susceptibility of T23 Steel
TL;DR: In this article , the effect of carbon content on the stress-relief cracking (SRC) sensitivity of T23 steel was evaluated according to fracture ductility, and a new viewpoint was put forward that the precipitation of M23C6 at the grain boundary was the main reason for SRC.
Journal ArticleDOI
Localized swelling of Fe-Cr-Ni alloy rollers in high-temperature applications
TL;DR: Localized swelling has been observed in 24Cr-24Ni-Nb steel transportation rollers used in the normalizing furnace of a plate mill after prolonged service at high temperature as discussed by the authors.
Journal ArticleDOI
Enhancing fatigue resistance of nanocrystalline Ni/Ni-W laminated composites
Min Zheng,Alexander Mielke +1 more
TL;DR: In this article , the fatigue strength of nanocrystalline Ni/Ni-W laminated composites was investigated and the deformation map was proposed to elucidate the critical condition of the formation of shear bands and voids.
Journal ArticleDOI
Elevated temperature intergranular cracking of heat-resistant alloy under tensile stress
Nam Hoe Heo,Jung-Chel Chang +1 more
TL;DR: In this paper, it was shown that the time to intergranular failure under tensile stress t can be expressed by t 0 σ −n exp (Q/RT), where t 0 is the constant of proportionality, n is the stress exponent, and Q is the activation enthalpy.
References
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Journal ArticleDOI
On grain boundary sliding and diffusional creep
Rishi Raj,M.F. Ashby +1 more
TL;DR: In this paper, the problem of sliding at a nonplanar grain boundary is considered in detail, and the results give solutions to the following problems: 1) How much sliding occurs in a polycrystal when neither diffusive flow nor dislocation motion is possible? 2) What is the sliding rate at a wavy or stepped grain boundary when diffusional flow of matter occurs? 3) How is the rate of diffusional creep in polycrystals in which grain boundaries slide? 4) how is this creep rate affected by grain shape, and grain boundary migration? 5)
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A first report on deformation-mechanism maps
TL;DR: Deformations-mechanism maps as discussed by the authors display the fields of stress and temperature in which a particular mechanism of plastic flow is dominant, i.e., dislocation glide, diffusional flow and dislocation creep.
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Intergranular fracture at elevated temperature
Rishi Raj,M.F. Ashby +1 more
TL;DR: In this paper, the authors analyzed the kinetic problem of intergranular fracture at elevated temperatures by the nucleation and growth of voids in the grain boundary and calculated the time-to-fracture.
Journal ArticleDOI
Cavity formation from inclusions in ductile fracture
A. S. Argon,Jay Im,R. Safoglu +2 more
TL;DR: In this article, the authors examined the conditions for cavity formation from equiaxed inclusions in ductile fracture and found that critical local elastic energy conditions are necessary but not sufficient for cavities formation.