ISSN:
1434-6036
Keywords:
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
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050206
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