Journal ArticleDOI
The influence of grain boundaries on mechanical properties
J. P. Hirth
- Vol. 3, Iss: 12, pp 3047-3067
TLDR
The effect of interfaces on mechanical properties is considered in this paper, with emphasis on dislocation mechanisms and the atomic scale structure of boundaries, and Elastic and plastic compatibilities at boundaries are treated.Abstract:
The effect of interfaces on mechanical properties is considered. Elastic and plastic compatibilities at boundaries are treated. Specific influences at both low and high temperatures are discussed, with emphasis on dislocation mechanisms and the atomic scale structure of boundaries.read more
Citations
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Journal ArticleDOI
Physics and phenomenology of strain hardening: the FCC case
U.F. Kocks,H. Mecking +1 more
Journal ArticleDOI
Dislocation wall and cell structures and long-range internal stresses in deformed metal crystals
TL;DR: In this article, a simple model for single-slip and multiple-slink deformation is proposed, in which the crystal is considered as a composite consisting of hard dislocation walls of high local dislocation density which are separated by soft regions of low local dislocations density.
Journal ArticleDOI
Effect of nanocrystalline and ultrafine grain sizes on the strain rate sensitivity and activation volume: fcc versus bcc metals
TL;DR: In this paper, the authors present experimental results from their in-house tests on UFG Cu, Fe and Ta, along with those available in literature, regarding the behavior of SRS and activation volume of UFG/nc metals with face-centered cubic (fcc) and bodycentered cubic structures.
Journal ArticleDOI
Six decades of the Hall–Petch effect – a survey of grain-size strengthening studies on pure metals
TL;DR: In this paper, the authors gather the grain-size strengthening data from the Hall-Petch studies on pure metals and use this aggregated data to calculate best estimates of these metals' Hall-petch parameters.
Journal ArticleDOI
Mechanical behavior of nanocrystalline Cu and Pd
TL;DR: In this article, the bulk mechanical properties of samples of nanocrystalline Cu and Pd consolidated from powders prepared by inert gas condensation were studied. But the results of the study were limited.
References
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Book
Theory of Dislocations
John Price Hirth,Jens Lothe +1 more
TL;DR: Dislocations in Isotropic Continua: Effects of Crystal Structure on Dislocations and Dislocation-Point-Defect Interactions at Finite temperatures.
Journal ArticleDOI
The Deformation and Ageing of Mild Steel: III Discussion of Results
TL;DR: In this paper, an attempt is made to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory.
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...
Journal ArticleDOI
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.
Journal ArticleDOI
The structure of high-angle grain boundaries
TL;DR: In this paper, a superimposed dislocation network is proposed for the cubic system, which is a natural extension of previous dislocation models and models based on coincidence relationships, and explains many of the observed properties of grain boundaries.