Generalized stacking fault energetics and dislocation properties: compact vs. spread unit dislocation structures in TiAl and CuAu
Condensed Matter
2009-10-31 v1
Abstract
We present a general scheme for analyzing the structure and mobility of dislocations based on solutions of the Peierls-Nabarro model with a two component displacement field and restoring forces determined from the ab-initio generalized stacking fault energetics (ie., the so-called -surface). The approach is used to investigate dislocations in L1 TiAl and CuAu; predicted differences in the unit dislocation properties are explicitly related with features of the -surface geometry. A unified description of compact, spread and split dislocation cores is provided with an important characteristic "dissociation path" revealed by this highly tractable scheme.
Keywords
Cite
@article{arxiv.cond-mat/9809148,
title = {Generalized stacking fault energetics and dislocation properties: compact vs. spread unit dislocation structures in TiAl and CuAu},
author = {Oleg N. Mryasov and Yu. N. Gornostyrev and A. J. Freeman},
journal= {arXiv preprint arXiv:cond-mat/9809148},
year = {2009}
}
Comments
7 two columns pages, 2 eps figures. Phys. Rev. B. accepted November 1998