材料科学
凝聚态物理
晶界强化
霍尔效应
工程物理
冶金
微观结构
晶界
物理
磁场
量子力学
作者
Vladimir Bata,Elena V. Pereloma
标识
DOI:10.1016/j.actamat.2003.10.002
摘要
Abstract A new physical model to explain the Hall–Petch relation is proposed. The main assumption is that the Hall-Petch slope ( k y ), is proportional to the work required to eject dislocations from grain boundaries. The model predicts a traditional Hall–Petch relation down to a grain size of about 5 μm, below which a deviation from linearity is observed. The strengthening peaks in the vicinity of 30 nm, and further grain refinement leads to softening. A semi-empirical equation is developed, which takes into account the effects of grain boundary strain energy. The model is applicable to both equiaxed and non-equiaxed grain structures.
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