Abstract

The effect of the interface on the fracture of metal heterostructures under constant-rate uniaxial tension was investigated by molecular dynamics simulations. It was found that the presence of an interface aligned in the direction of the tensile loading axis leads to the strengthening of the sample. A cause of the observed strengthening is the inflow of atoms of one metal into the voids in the subsystem of another metal formed during stretching. In addition, the Chernov–Luders bands propagating in the neck region in the copper and silver components of the heterostructure change their paths when crossing the interface, which results in smaller displacements of the atomic planes in each of the metals.

中文翻译：

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单轴拉伸作用下界面对异质结构断裂的分子动力学研究

摘要

通过分子动力学模拟研究了界面在恒定速率单轴拉伸下对金属异质结构断裂的影响。已经发现，沿拉伸载荷轴方向对准的界面的存在导致样品的增强。观察到的强化的原因是一种金属的原子流入到在拉伸过程中形成的另一种金属的子系统中的空隙中。另外，在异质结构的铜和银组分的颈部区域中传播的Chernov-Luders能带在穿过界面时会改变其路径，从而导致每种金属中原子平面的位移较小。