Tungsten (W) is a promising candidate material for future fusion reactors. The shock waves generated under high-energy neutron radiation can lead to the formation of prismatic interstitial dislocation loops (PIDLs). To understand the details of the mechanisms, the interaction between the shock waves and PIDL with Burgers vector of 1/2<111> was studied by using nonequilibrium molecular dynamics (NEMD) simulation. The shock-induced change of habit plane for the 1/2<111> PIDL and plasticity in W depend strongly on the crystallographic orientations. The driving force for changing the loop's habit plane is derived from the resolved shear stress (RSS). A new rotation mechanism is proposed, which can be used to predict the changing trend of PIDL's habit plane. The rotation angle of the habit plane for the 1/2<111> dislocation loop is proportional to the RSS of the activated slip system. In this work, we also predict a source to induce the plasticity (e.g., deformation twin and dislocation network) observed in the experiment and discuss the nucleation, propagation and interaction of these deformations with different crystallographic orientation. The current results provide significant insights into the evolution of 1/2<111> PIDL depending on the crystallographic orientation under shock loading.

钨 (W) 是未来聚变反应堆很有前途的候选材料。高能中子辐射下产生的冲击波可导致棱柱状间隙位错环（PIDL）的形成。为了了解机理的细节，使用非平衡分子动力学（NEMD）模拟研究了冲击波和PIDL与1/2 111 的Burgers矢量之间的相互作用。1/2 111 PIDL 的惯常平面的冲击引起的变化和W 中的可塑性在很大程度上取决于晶体取向。改变循环习惯平面的驱动力来自于已解析的剪切应力 (RSS)。提出了一种新的旋转机制，可用于预测PIDL习惯平面的变化趋势。习惯平面的旋转角度为 1/2<111> 位错环与激活滑移系统的 RSS 成正比。在这项工作中，我们还预测了在实验中观察到的诱发塑性的来源（例如，变形孪晶和位错网络），并讨论了这些变形与不同晶体取向的成核、传播和相互作用。目前的结果为1/2 111 PIDL 的演变提供了重要的见解，这取决于冲击载荷下的晶体取向。