Journal ArticleDOI
The role of matrix dislocations in the superplastic deformation of a copper alloy
TLDR
In this article, the densities of dislocations trapped in coherent twin boundaries may be used to provide a direct and quantitative comparison of the extent of intragranular slip in the three regions of behaviour associated with superplasticity.About:
This article is published in Acta Metallurgica.The article was published on 1986-07-01. It has received 65 citations till now. The article focuses on the topics: Partial dislocations & Grain boundary.read more
Citations
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Journal ArticleDOI
A unified approach to grain boundary sliding in creep and superplasticity
TL;DR: In this paper, a unified model is developed for Rachinger boundary sliding at all grain sizes, where the rate of sliding is controlled by the rates of accomodation through intragranular slip.
Journal ArticleDOI
Superplasticity in advanced materials
TL;DR: A review of superplasticity in polycrystalline materials can be found in this article, where the authors present an overview of these new developments using the established behavior of conventional metallic alloys as a standard for comparison with the mechanical properties of new materials.
Journal ArticleDOI
Seventy-five years of superplasticity: historic developments and new opportunities
TL;DR: A review of the current understanding of the flow of superplastic metals and ceramics can be found in this paper, where a minor modification to the present definition of super-plasticity is proposed.
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Principles of superplasticity in ultrafine-grained materials
TL;DR: In this paper, the authors examined various reports of superplasticity in ultrafine-grained materials and showed that these materials exhibit many characteristics similar to conventional super-plastic alloys.
Journal ArticleDOI
Advances in ultrafine-grained materials
TL;DR: In this article, the major procedures of equal-channel angular pressing and high-pressure torsion of ultrafine-grained (UFG) materials are discussed and compared.
References
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Journal ArticleDOI
Diffusional Viscosity of a Polycrystalline Solid
TL;DR: In this article, it is suggested that mosaic boundaries and boundaries between grains of nearly the same orientation may not serve as sources or sinks of the diffusion currents, in which case the creep rate will depend only on the configuration of grain boundaries having a sizable orientation differen...
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A Model for Boundary Diffusion Controlled Creep in Polycrystalline Materials
TL;DR: In this article, the authors discussed the mechanism of creep in polycrystalline alumina based on the differences between the lattice and boundary diffusion models and showed that the boundary diffusion model is more stable than lattice diffusion model, while the grain size dependence and the numerical constant are greater.
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Interface controlled diffusional creep
TL;DR: In this article, the authors derived expressions for the rate of diffusional flow when the density of sinks and sources becomes small and when their mobility is limited by impurities, solutes, or precipitates.
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Interpretation of superplastic flow in terms of a threshold stress
TL;DR: In this paper, a sigmoidal relationship between stress and strain rate is noted and the mechanical behavior has been divided into three regions: low-stress region (region I), intermediatestress region (the superplastic region or region II), and high-stress region(region III).