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Grain Boundary Segregation in a two Dimensional Lattice Gas Model

Published online by Cambridge University Press:  26 February 2011

D. Farkas  and
H. Jang
D. Farkas
Affiliation:
Department of Materials Engineering, VPI & SU Blacksburg, Va. 24061
H. Jang
Affiliation:
Department of Materials Engineering, VPI & SU Blacksburg, Va. 24061
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Abstract

A two dimensional lattice gas model of a binary ordering alloy system was used to study the segregation and the atomic configuration near a ⅀ = 5 grain boundary. The cluster variation calculation was performed to study the segregation of alloying elements in the grain boundary region. The present model allows the study of different ordering configurations in the grain boundary region as well as the segregation effect in the vicinity of the grain boundary. The results show that there will be segregation effects and that they can be significant. It is essential that the segregation and disordering effects be considered when high temperature properties of grain boundaries in ordered alloys are studied. The type of segregation observed depends on energetic assumptions used in the calculation and on the rigid body translational state of the boundary.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 122: Symposium I – Interfacial Structure, Properties, and Design , 1988 , 269
Copyright
Copyright © Materials Research Society 1988

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References

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