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Computer Simulation of Elastic Properties of Grain Boundary Materials

Published online by Cambridge University Press:  21 February 2011

D. Wolf
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. F. Lutsko
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Lattice statics and lattice dyanamics computer simulation methods are applied to investigate the elastic properties of grain boundaries in fcc metals. The elastic constants in the GB reigon are found to differ significantly from their bulk ideal-crystal values. Due to the broken symmetry in the GB region a pronounced anisotropy of the elastic properties is observed. Whereas Young's moduli are found to increase in the GB region, the shear moduli and Poisson's ratios generally decrease. The magnitude of these effects is shown to depend sensitively on the GB structure.

Type
Research Article
Copyright
Copyright © Materials Research Society 1988

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References

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