论文标题
晶界断开的表征和可视化
Characterization and visualization of grain boundary disconnections
论文作者
论文摘要
我们介绍了一种可视化原子水平晶界位错的方法。它使用原子级NYE张量，代表位错密度。为了在晶界计算NYE张量，我们将Hartley-Mishin菌株梯度计算扩展到位移移位完整的晶格。我们表明，该方法可有效地可视化断开连接和晶界相结合在身体中心的立方钨中的脱位含量，以及以面部为中心的立方铜。此外，我们使用该方法来表征钨在对称的倾斜晶界中二维晶界相核的形态。该方法可以应用于大容量脱位和晶界断开连接，这是研究与晶界和晶界断开相互作用的相互作用和反应的理想选择。
We introduce a method to visualize dislocations along grain boundaries at the atomic level. It uses an atomic-level Nye tensor, representing the dislocation density. To calculate the Nye tensor at grain boundaries, we extend the Hartley-Mishin strain gradient calculation to the displacement shift complete lattice. We show that the method is effective in visualizing disconnections and the dislocation content of grain boundary phase junctions in body-centered cubic tungsten, as well as face-centered cubic copper. In addition, we use the method to characterize the morphology of a two-dimensional grain boundary phase nucleus in a symmetric tilt grain boundary in tungsten. This method can be applied to both bulk dislocations and grain boundary disconnections, which makes it ideal for studying the interactions and reactions of bulk dislocations with grain boundaries, and grain boundary disconnections.
