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Philosophical Magazine Letters Volume 59, 1989 - Issue 2
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Original Articles

On the structural unit model of grain boundary structure

A. P. Sutton Department of Metallurgy and Science of Materials, Oxford University, Parks Road, Oxford, OX1 3PH, England
Pages 53-59 | Received 14 Oct 1988, Accepted 02 Nov 1988, Published online: 20 Aug 2006
 
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Abstract

A critique of the structural unit model is presented. It is shown that the predictive capacity of the model is severely limited when it is applied to boundaries with relatively-high-index rotation axes. Recent computer simulations suggest that ‘high index’ means 〈221〉 and above. A new approach to grain boundary structure is needed for mixed tilt and twist boundaries.

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