The introduction of a glass–glass interface is an effective way to improve the plasticity of metallic glass. However, the strength–plasticity trade-off has not still been effectively overcome. Here, the effect of the composition on the mechanical properties and deformation behavior of the CuZr nanoglass (NG) is investigated under tensile loading by a molecular dynamics simulation. The results indicate that high-performance NGs can be obtained by adjusting the percentage of Cu atoms. There is a critical Cu content (i.e., 75%), which makes the NGs have both high strength and high plasticity. The results show that with the increase in the Cu content, the deformation mechanism of the NGs changes from necking to uniform plastic deformation and then to the nucleation and the growth of the main shear band. Our results underscore the importance of the composition in the design and preparation of high-performance metallic glass.

中文翻译：

---

成分对金属纳米玻璃机械性能的影响：分子动力学模拟的见解

引入玻璃-玻璃界面是提高金属玻璃塑性的有效途径。然而，强度-塑性的权衡仍未得到有效克服。在这里，通过分子动力学模拟研究了在拉伸载荷下成分对 CuZr 纳米玻璃 (NG) 机械性能和变形行为的影响。结果表明，通过调节Cu原子的百分比可以获得高性能的NGs。存在临界Cu含量（即75%），这使得NGs同时具有高强度和高塑性。结果表明，随着Cu含量的增加，NGs的变形机制由颈缩转变为均匀塑性变形，再转变为主剪切带的形核和长大。