Abstract Molecular dynamics simulations were employed to investigate the effect of void defect on the shear band nucleation in a Cu64Zr36 metallic glass. Unlike uniform samples, the samples with void defects can form shear bands at a much lower strain. Finite element simulation revealed stress concentration near the voids, which can explain the early formation of shear bands. The shear band behaviors are also influenced by the size, shape and distribution of the defects. These findings can provide simulation support to understand the shear band heterogeneous nucleation process of metallic glasses in the real case.

中文翻译：

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空隙缺陷对金属玻璃剪切带形核的影响

摘要 采用分子动力学模拟研究了空洞缺陷对Cu64Zr36 金属玻璃剪切带形核的影响。与均匀样品不同，具有空隙缺陷的样品可以在低得多的应变下形成剪切带。有限元模拟揭示了空隙附近的应力集中，这可以解释剪切带的早期形成。剪切带行为也受缺陷的大小、形状和分布的影响。这些发现可以为理解真实情况下金属玻璃的剪切带异质成核过程提供模拟支持。