Effect of inclination dependence of grain boundary energy on the mobility of tilt and non-tilt low-angle grain boundaries

In contrast to a 9.1° tilt grain boundary, which remains straight and immobile at elevated temperatures, a 9.1° mixed boundary easily assumes a curved shape and steadily moves under a capillary force. Molecular statics simulations suggest that this is due to the inclination dependence of grain bound...

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Bibliographic Details
Published in:Scripta materialia 2013-06, Vol.68 (12), p.980-983
Main Authors: Brandenburg, J.-E., Barrales-Mora, L.A., Molodov, D.A., Gottstein, G.
Format: Article
Language:English
Subjects:
Faceting
Grain boundary energy
Grain boundary migration
Inclination
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Summary:In contrast to a 9.1° tilt grain boundary, which remains straight and immobile at elevated temperatures, a 9.1° mixed boundary easily assumes a curved shape and steadily moves under a capillary force. Molecular statics simulations suggest that this is due to the inclination dependence of grain boundary energy, which in turn depends on boundary geometry. The energy of a tilt boundary was found to change, whereas that of a mixed boundary was found not to change with boundary inclination.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2013.02.054