T0101-3-2 余分な粒界転位成分が及ぼすき裂先端に対する遮へい・反遮へい効果の分子動力学解析([T0101-3]マイクロ・ナノ材料システムの力学と強度・機能評価(3):先端材料システムの強度・機能解析(マクロ～マイクロ・ナノ))

抄録

Extrinsic grain boundary dislocations (EGBDs) are often observed in ultra fine-grained metals produced by severe plastic deformation (e.g. ECAP or ARB etc.). The mechanical properties of such metals are different from those of coarsegrained metals. That is, EGBDs could be important factor to elucidate the unique mechanical properties. In this study, introducing lattice dislocations into an equilibrium grain boundary by pre-deformation, we evaluate the influence of the EGBD component on the crack tip shielding effect using J-integral analyses.