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Microstructural Dynamic Study of Grain Growth

Published online by Cambridge University Press:  25 February 2011

M. P. Anderson ,
G. S. Grest  and
D. J. Srolovitz
M. P. Anderson
Affiliation:
Exxon Research and Engineering Company, Annandale, NJ 08801
G. S. Grest
Affiliation:
Exxon Research and Engineering Company, Annandale, NJ 08801
D. J. Srolovitz
Affiliation:
Los Alamos National Laboratory, Los Alamos, WM87 545
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Extract

The complete prediction of microstructural development in polycrystalline solids as a function of time and temperature is a major objective in materials science, but has not yet been possible primarily due to the complexity of the grain interactions. The evolution of the polycrystalline structure depends upon the precise specification of the coordinates of the grain boundary network, the crystallographic orientations of the grains, and the postulated microscopic mechanisms by which elements of the boundaries are assumed to move. Therefore, a general analytical solution to this multivariate problem has not yet been developed. Recently, we have been able to successfully incorporate these aspects of the grain interactions, and have developed a computer model which predicts the main features of the microstructure from first principles [1,2]., The polycrystal is mapped onto a discrete lattice by dividing the material into small area (2d) or volume (3d) elements, and placing the centers of these elements on lattice points. Interactions and dynamics are then defined for the individual elements which are analagous to those postulated in continuous systems. This discrete model preserves the topological features of real materials, and can be studied by computer simulation using Monte Carlo techniques. In this paper we report the application of the Monte Carlo method to the metallurgical phenomenon of grain growth with isothermal annealing. Extension of the model to treat primary recrystallization is presented elsewhere [3,4].

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 63: Symposium R – Computer-Based Microscopic Description of the Structure and Properties of Materials , 1985 , 225
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

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