Cu-9 at.% Al合金対称双結晶の引張りにおける微視的非適合性と転位密度不均質性の関係

概要

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Slip deformation in Cu-9 at.% Al symmetric type bicrystal models subjected to tensile loading is investigated by a finite element crystal plasticity analysis code. Accumulation of geometrically necessary dislocations (GNDs) and statistically stored dislocations (SSDs) are studied in detail. Results of the analysis show asymmetric non-uniform deformation and accumulation of GNDs on the primary and secondary slip systems with activity of secondary slip system near the grain boundary. Mechanism of asymmetric non-uniform deformation with GNDs accumulated near the grain boundary in the Cu-9at.% Al symmetric-type bicrystal models is discussed from the viewpoint effects of elastic anisotropy of Cu-9at.% Al and heterogeneity of initial statically stored dislocations density.
2006-04-25