In this manuscript, experimental yield stress data as a function of temperature of the body-centered cubic refractory complex concentrated alloy MoNbTaW are analyzed using two solid solution strengthening models: the Rao-Suzuki model (screw strengthening) and the Maresca-Curtin model (edge strengthening). It is shown that the Rao-Suzuki model results are in reasonable agreement with the experimental yield data whereas the Maresca-Curtin model underpredicts the strengthening. Similarly, molecular dynamics data on the critical stress to move screw and edge dislocations in MoNbTaW are analyzed using the Rao-Suzuki and the Maresca-Curtin models, respectively. It is shown that the molecular dynamics edge mobility results are in reasonable agreement with the Maresca-Curtin model whereas the molecular dynamics simulated data on the critical stress to move screw dislocations in MoNbTaW severely overpredicts the Rao-Suzuki model. This is argued to be a result of the very small dislocation line lengths used in the molecular dynamics simulations, ∼150A.

中文翻译：

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体心立方难熔复合浓缩合金MoNbTaW的固溶强化

在本手稿中，使用两种固溶强化模型：Rao-Suzuki 模型（螺钉强化）和 Maresca-Curtin 模型（边缘强化），对体心立方难熔复合浓缩合金 MoNbTaW 的实验屈服应力数据作为温度的函数进行了分析。强化）。结果表明，Rao-Suzuki 模型结果与实验产量数据相当一致，而 Maresca-Curtin 模型则低估了强化。同样，分别使用 Rao-Suzuki 和 Maresca-Curtin 模型分析了 MoNbTaW 中移动螺旋位错和刃位错的临界应力的分子动力学数据。结果表明，分子动力学边缘迁移率结果与 Maresca-Curtin 模型相当一致，而 MoNbTaW 中移动螺旋位错的临界应力的分子动力学模拟数据严重高估了 Rao-Suzuki 模型。这被认为是分子动力学模拟中使用的位错线长度非常小的结果，~150A。