Abstract It has been shown in experiments that self-climb of prismatic dislocation loops by pipe diffusion plays important roles in their dynamical behaviors, e.g., coarsening of prismatic loops upon annealing, as well as the physical and mechanical properties of materials with irradiation. In this paper, we show that the dislocation dynamics self-climb formulation that we derived in (Niu et al., 2017) is able to quantitatively describe the properties of self-climb of prismatic loops that were observed in experiments and atomistic simulations. This dislocation dynamics formulation applies to self-climb by pipe diffusion for any configurations of dislocations, and is able to recover the available models in the literature for rigid self-climb motion of small prismatic loops. We also present implementation method of this self-climb formulation. Simulations performed show evolution, translation and coalescence of prismatic loops as well as prismatic loops driven by an edge dislocation by self-climb motion and the elastic interaction between them. These results are in excellent agreement with available experimental and atomistic results. We have also performed systematic analyses of the behaviors of a prismatic loop under the elastic interaction with an infinite, straight edge dislocation by motions of self-climb and glide.

中文翻译：

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空管扩散引起位错环自爬的位错动力学公式

摘要 实验表明，管状扩散引起的棱柱位错环的自爬对其动力学行为起着重要的作用，例如退火时棱柱环的粗化，以及辐照后材料的物理和机械性能。在本文中，我们表明我们在（Niu 等人，2017 年）中推导出的位错动力学自爬公式能够定量描述在实验和原子模拟中观察到的棱柱环的自爬特性。这种位错动力学公式适用于任何位错配置的管道扩散自爬，并且能够恢复文献中的可用模型，用于小棱柱环的刚性自爬运动。我们还介绍了这种自爬公式的实现方法。进行的模拟显示了棱柱环的演化、平移和合并，以及由自爬运动引起的边缘位错驱动的棱柱环以及它们之间的弹性相互作用。这些结果与可用的实验和原子学结果非常一致。我们还对棱柱环在弹性相互作用下的行为进行了系统分析，该弹性相互作用通过自攀爬和滑行运动与无限直边位错。