论文标题
Cu纳米圆骨中双二极管相互作用的原子机制
Atomistic mechanisms of twin-twin interactions in Cu nanopillars
论文作者
论文摘要
双胞胎是金属纳米柱中塑性变形的一种重要模式。当双胞胎发生在多个系统上时，属于不同双胞胎系统的双胞胎可能会相互作用并形成一个复杂的双胞胎连接。揭示了双二极管相互作用如何导致不同双交界的原子学机制对于我们对材料机械行为的理解至关重要。在本文中，我们报告了使用原子模拟在Cu纳米柱中形成两种不同的双旋风相互作用/连接的原子机制。一个交界处包含两个双边界，以及一个$σ$ 9的边界，另一个连接包含五个双边界（五倍双胞胎）。在[100]和$ [1 \ bar1 0] $ cu纳米柱的拉伸变形期间观察到这些连接。
Twinning is an important mode of plastic deformation in metallic nanopillars. When twinning occurs on multiple systems, it is possible that twins belonging to different twin systems interact and forms a complex twin-twin junctions. Revealing the atomistic mechanisms of how twin-twin interactions lead to different twin junctions is crucial for our understanding of mechanical behaviour of materials. In this paper, we report the atomistic mechanisms responsible for the formation of two different twin-twin interactions/junctions in Cu nanopillars using atomistic simulations. One junction contains two twin boundaries along with one $Σ$9 boundary, while the other contains five twin boundaries (five-fold twin). These junctions were observed during the tensile deformation of [100] and $[1\bar1 0]$ Cu nanopillars, respectively.
