... to largest strengthening. This is completely dependent on the plastic strain gradient hardening due to distribution and evolution of geometrically necessary dislocations that depend on the particle size and shape. Gradient-hardening significantly alter the stress and plastic strain distributions near...

... Plasticity Geometrically Necessary Dislocations Bilinear Behavior In a number of crystalline materials, a size effect is detected in microbend, microtwist 1 2 , and indentation hardness experiments 3 . In studies of indentation hardness, several researchers had observed an indentation size...