Mechanism for diffusion induced grain boundary migration
Robert W. Balluffi,John W. Cahn +1 more
Reads0
Chats0
TLDR
In this paper, the authors proposed a mechanism in which differences in the diffusion coefficients of the diffusing species along the grain boundary cause a self-sustaining climb of grain boundary dislocations and motion of their associated grain boundary steps.About:
This article is published in Acta Metallurgica.The article was published on 1981-03-01 and is currently open access. It has received 286 citations till now. The article focuses on the topics: Grain boundary diffusion coefficient & Grain boundary strengthening.read more
Figures
Citations
More filters
Journal ArticleDOI
Microstructure and hardness studies of Inconel 718 manufactured by selective laser melting before and after solution heat treatment
TL;DR: The microstructure of AM Inconel 718 in general and Selective Laser Melting (SLM) in particular is different from the material produced by conventional methods due to the rapid solidification process associated with the former as mentioned in this paper.
Journal ArticleDOI
In situ TEM observations of fast grain-boundary motion in stressed nanocrystalline aluminum films
TL;DR: In this paper, the authors show that extensive grain-boundary migration occurs preferentially at crack tips and only in the presence of applied stress, and that the growth occurs in a faceted manner indicative of preferential boundaries.
Journal ArticleDOI
Effect of grain size on mechanical properties of nanocrystalline materials
TL;DR: In this article, the possibility of a dislocation mechanism in the deformation process of nanocrystalline materials is reviewed and analyzed, by taking the anisotropic characteristic of crystallographic symmetry and different choices of critical shear strength into account, results in a reasonable limit in grain size for applying dislocation pile-up theory to nanocrystine materials.
Journal ArticleDOI
Grain-boundary kinetics: A unified approach
TL;DR: In this article, a review of the GB kinetics literature is provided, and the authors draw comparisons from a wide swath of the extant experimental, simulation, and theoretical GB kinetic behavior literature.
Journal ArticleDOI
Grain boundary diffusion mechanisms in metals
TL;DR: In this article, the authors reviewed the current knowledge of the atomistic mechanisms responsible for grain boundary diffusion phenomena and concluded that the atomic migration occurs by a point defect exchange mechanism which, in at least the vast majority of boundaries in simple metals, most likely involves grain boundary vacancies.
References
More filters
Book
Selected values of the thermodynamic properties of binary alloys
TL;DR: A complete revision of the work, Selected Values of Thermodynamic Properties of Metals and Alloys, by Hultgren, Orr, Anderson, and Kelley, published in 1963 by John Wiley and Sons, New York, is presented in this paper.
Journal ArticleDOI
Chemically induced grain boundary migration
Mats Hillert,Gary R. Purdy +1 more
TL;DR: In this paper, it was shown that gram boundary motion can be induced by changing the composition by means of grain boundary diffusion, and the experimental results can be used to evaluate rather directly the grain boundary diffusivity and mobility.
Journal ArticleDOI
Diffusion induced grain boundary migration
TL;DR: This paper showed that grain boundaries and interphase boundaries provide high diffusivity paths in solids, but little bulk composition change can occur at temperatures where lattice diffusion is frozen out unless the boundaries migrate.
Journal ArticleDOI
The effects on grain-boundary processes of the steps in the boundary plane associated with the cores of grain-boundary dislocations
Alexander H. King,D. A. Smith +1 more
TL;DR: The contribution of the associated steps to the properties of grain-boundary dislocations is investigated in this paper, where two methods of step-height determination are given and it is shown that the step height, like the Burgers vector, must be conserved during the reactions of grain boundaries, this is not always automatic and additional coherent steps must take part in some reactions.