The characteristics of interstitial atoms and vacancies in the Fe₂₀Ni₂₀Cr₂₀Co₂₀Cu₂₀ high-entropy alloy have been determined by the molecular dynamics and statics methods. The effect of these defects on elastic moduli has been analyzed. It has been found that interstitial atoms are stable only in the form of dumbbells responsible for a significant diaelastic effect (decrease in the shear modulus). As compared to vacancies, an increase in the concentration of interstitial dumbbells much more rapidly reduces the shear modulus with an increase in the volume. Furthermore, interstitial dumbbells are responsible for the appearance of specific high- and low-frequency modes in the spectrum of the vibrational density of states. The latter modes are related to the observed diaelastic effect. The evolution of the diaelastic effect and vibrational spectrum during the transition of the system to a noncrystalline state has been studied.

中文翻译：

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Fe 20 Ni 20 Cr 20 Co 20 Cu 20高熵合金的点缺陷及其性能

Fe ₂₀ Ni ₂₀ Cr ₂₀ Co ₂₀ Cu _20中的间隙原子和空位的特征高熵合金是通过分子动力学和静力学方法确定的。分析了这些缺陷对弹性模量的影响。已经发现，间隙原子仅以引起显着的双弹性效应（剪切模量降低）的哑铃形式稳定。与空位相比，填隙哑铃浓度的增加会随着体积的增加而迅速降低剪切模量。此外，间隙哑铃负责状态振动密度谱中特定的高频和低频模式的出现。后一种模式与观察到的双弹性效应有关。研究了系统转变为非晶态期间的双弹性效应和振动谱的演变。