Special interaction between quasiperiodic grain boundaries and lattice dislocations in crystalline solids

被引：0
|
作者：
M.Y. Gutkin
I.A. Ovid'ko
机构：
[1] Russian Academy of Sciences,Institute of Machine Science Problems
[2] ,undefined
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 1998年 / 1卷
关键词：
PACS. 62.20.Fe Deformation and plasticity (including yield, ductility, and superplasticity) - 68.35.Ct Interface structure and roughness - 68.35.Dv Composition; defects and impurities;
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摘要：
A theoretical model is suggested which describes phason imperfections (specific excitations) in a quasiperiodic grain boundary in a polycrystalline solid as dilatation flexes. In the framework of the model, an elastic stress field of the quasiperiodic grain boundary is calculated as a stress field created by an ensemble of dilatation flexes (phason imperfections) located in the boundary. It is shown that there is a special elastic interaction between crystal lattice defects and quasiperiodic grain boundaries comprising phason imperfections. The strengthening effect in plastically deformed polycrystalline solids is quantitatively described which is related to the special elastic interaction between lattice dislocations and quasiperiodic grain boundaries.
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页码：429 / 437
页数：8
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