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Dislocation Density Propagation adjacent to the Low Angle Grain Boundaries of Polycrystalline Materials  

Ma, Jeong-Beom (한양대학교 기계공학부)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.20, no.5, 2011 , pp. 618-622 More about this Journal
Abstract
Specialized large-scale computational finite-element and molecular dynamic models have been used in order to understand and predict how dislocation density emission and contact stress field due to nanoindentation affect inelastic deformation evolution scales that span the molecular to the continuum level in ductile crystalline systems. Dislocation density distributions and local stress fields have been obtained for different crystalline slip-system and grain-boundary orientations. The interrelated effects of grain-boundary interfaces and orientations, dislocation density evolution and crystalline structure on indentation inelastic regions have been investigated.
Keywords
Dislocation density evolution; Grain boundary; Nanoindentation;
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