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Grain Boundary Sink Strength in Anisotropic Materials
Author(s) -
Sarce A.,
Savino E. J.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221590205
Subject(s) - anisotropy , materials science , thermal diffusivity , condensed matter physics , grain boundary , sink (geography) , grain size , lattice (music) , grain boundary strengthening , thermodynamics , composite material , physics , microstructure , optics , cartography , acoustics , geography
The grain boundary sink strengths for intrinsic point defects in an anisotropic lattice are calculated. It is shown that the sink strength depends on the grain size, its shape, its metallurgical state, and for hexagonal symmetry, on the anisotropy factor for the diffusivity ( D c / D a ). It appears to be independent of the volume averaged diffusivity constant. For the grain shape dependence, the Holt and Ibrahim anisotropy factor is obtained only as a limit case.