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Correlation Between the Structure, Energy, and Local Elastic Properties of Grain Boundaries in Metals

Published online by Cambridge University Press:  28 February 2011

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

The zero-temperature energies and equilibrium volume expansions of point-defect free asymmetrical grain boundaries (GBs) involving the four densest planes in fcc bicrystals (with some higher-index plane on the other side of the interface) have been determined using an embedded-atom-method potential fitted to Au. It is found that the two asymmetrical tilt GBs at the endpoints of the related GB energy vs. twist misorientation curves give rise to pronounced energy cusps. As for symmetrical GBs, a practically linear relationship between the GB energy and equilibrium volume expansion is observed. The volume expansion and the destruction of the perfectcrystal stacking at the GB are shown to cause a pronounced local decrease in the resistance towards shear parallel to the GB plane.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 389
Copyright
Copyright © Materials Research Society 1989

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