Abstract Metal/ceramic nano-multilayers, which possess the advantages of both metal and ceramics, have attracted intensive attention. In this work, the mechanical properties of V/VN nano-multilayers with different modulation periods (λs) were investigated using molecular dynamics simulations. The relationships between the microstructures and stress-strain (σ - e) curves during in-plane tension and out-of-plane compression were explored, and the effects of λ were discussed. It shows that: (i) three kinds of V/VN nano-multilayers with different interfacial structures have different stabilities during deformation; (ii) dislocations nucleate firstly from the interfaces, propagate on {111} planes in VN layers, and deposit on the adjacent interface, and finally shift to V layers with the increase of applied strain; (iii) the nano-multilayer with larger λ has larger elastic modulus, elastic limit and lattice integrity, and strain hardening and cracks would appear in the nano-multilayers with λ > 42.90 A.

中文翻译：

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调制周期对V/VN纳米多层膜力学性能的影响

摘要 金属/陶瓷纳米多层膜兼具金属和陶瓷的优点，受到广泛关注。在这项工作中，使用分子动力学模拟研究了具有不同调制周期 (λs) 的 V/VN 纳米多层的机械性能。探讨了面内拉伸和面外压缩过程中微观结构与应力-应变 (σ - e) 曲线之间的关系，并讨论了 λ 的影响。表明：(i)三种界面结构不同的V/VN纳米多层膜在变形过程中具有不同的稳定性；(ii) 位错首先从界面成核，在 VN 层中的 {111} 面上传播，并沉积在相邻界面上，最后随着外加应变的增加转移到 V 层；