Numerical Modeling of Dislocation-Grain Boundary Interaction and Continuum Mechanics Analyses for Mechanical Properties of Fine Grained Metals
Macroscopic mechanical response of metal polycrystal with mean grain diameter of 0.2 to 5 microns are simulated by a strain gradient crystal plasticity software code which incorporates some phenomenological models for dislocation accumulation and annihilation, as well as dislocation-grain boundary interactions. Obtained results of macroscopic stress-strain relation show significant increase of yield stress and strain hardening ratio for fine grained specimens.
Yuri Estrin and Hans Jürgen Maier
T. Ohashi et al., "Numerical Modeling of Dislocation-Grain Boundary Interaction and Continuum Mechanics Analyses for Mechanical Properties of Fine Grained Metals", Materials Science Forum, Vols. 584-586, pp. 1063-1068, 2008