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SEGREGATION AT GRAIN BOUNDARIES
Metallurgical Reviews, 1964Grain boundaries in crystalline solids exert a pronounced influence on almost all the properties of polycrystalline bodies, as well as affecting the kinetics of most solid-state processes that occur therein. They have therefore been the subject of numerous theoretical and experimental researches in both metallic and non-metallic ...
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Solute segregation at grain boundaries
Interface Science, 1996This feature article summarizes the present art and science of grain boundary segregation from the viewpoint of the authors activities in this field. In the part on equilibrium segregation, fundamental effects on grain boundary segregation are discussed such as the nature of the solute/matrix binary system, presence of additional elements, temperature,
Siegfried Hofmann, Pavel Leiĉek
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Grain Boundary Segregation. Grain Boundary Diffusion
1985In polycrystalline materials, grain boundaries differ from the monocrystalline bulk by : i) their structure, ii) their electronic properties, iii) their chemical composition, iv) the atomic mobility of all the species.
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On the chemistry of grain boundary segregation and grain boundary fracture
Metallurgical Transactions A, 1990This paper considers the problem of impurity segregation in metals and the effect of these impurities on grain boundary cohesion. The primary goal of this paper is to provide a physical model that will allow us to think about these two processes. We describe both of them in chemical terms.
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Impurity Segregation to Grain Boundaries
Journal of Testing and Evaluation, 1973Abstract Minute quantities of impurities present in a material can have a major influence on the mechanical, chemical, or electrical properties of materials when they are segregated in localized regions. Since grain boundaries are often the preferred regions for segregation, it is not surprising that the properties of grain boundaries ...
A Joshi, DF Stein
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Segregation and grain boundary structure
Surface Science Letters, 1984Abstract Atomic structure of the Σ = 5(210)/[001] symmetrical tilt boundary in Cu containing different amounts of segregated Bi has been investigated. The interatomic forces were described in terms of empirical pair potentials constructed so as to fit self consistently the enthalpy of mixing of this alloy system. The most important structural effects
V. Vitek, null Gui Jin Wang
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Journal of Materials Science, 2015
The Butler equation is extended to model equilibrium grain boundary (GB) energy and the equilibrium GB composition of a polycrystal, as a function of the following state parameters: bulk composition, temperature, pressure and the five degrees of freedom of the GB.
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The Butler equation is extended to model equilibrium grain boundary (GB) energy and the equilibrium GB composition of a polycrystal, as a function of the following state parameters: bulk composition, temperature, pressure and the five degrees of freedom of the GB.
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2012
The phenomenon by which a local enrichment in solutes (controlled additions or impurities) occurs in a material is named segregation; it results from a redistribution of the solutes between the crystals and certain faulted sites, like dislocations, surfaces, interfaces, during a thermal or thermo-mechanical treatment.
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The phenomenon by which a local enrichment in solutes (controlled additions or impurities) occurs in a material is named segregation; it results from a redistribution of the solutes between the crystals and certain faulted sites, like dislocations, surfaces, interfaces, during a thermal or thermo-mechanical treatment.
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Grain boundary segregation isotherms
Materials Science and Technology, 1997This overview is an attempt to consolidate the understanding that can be obtained through the measurement of grain boundary segregation isotherms in terms of (a) the kinetics of segregation, (b) the interaction processes among trace and alloying elements, and (c) the influence of solute elements, heat treatment practice, and applied tensile stress on ...
R. D. K. Misra, P. Rama Rao
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Bridging grain boundary volume to segregation at symmetric grain boundaries
Materials Science and Engineering: A, 2007Abstract Symmetric 〈1 1 0〉 type Al grain boundaries are experimentally and theoretically investigated. It is demonstrated that Ga segregation can be understood by incorporating the anisotropy of the relaxed grain boundary volumes. The feasibility of Ga film formation has been illustrated by applying a continuum model.
Moon, J. +3 more
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