Abstract High-entropy alloys (HEAs) are a class of alloys that can exhibit promising properties including enhanced irradiation resistance, high-temperature strength, and corrosion resistance. However, they exist in a relatively unexplored region of quasi-limitless composition space. Thus, to enable the development of promising compositionally complex alloys, such as HEAs, high-throughput methods are needed. Such high-throughput capabilities are developed and presented in this work. In situ alloying through additive manufacturing was employed to produce arrays of different HEA compositions. Sample arrays were then characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), all while remaining on the build plate. The top surface of each sample was compositionally homogeneous, as determined by EDS, and each sample exhibited a single-phase, disordered crystal structure, as determined by XRD. CALculation of PHAse Diagrams (CALPHAD) modeling was used to determine the equilibrium phases of each HEA composition at lower temperatures, the results of which were compared with XRD results. Implications of high-throughput synthesis techniques and the coupling of high-throughput characterization and modeling techniques are discussed in the context of alloy development.

中文翻译：

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通过增材制造高通量合成 Mo-Nb-Ta-W 高熵合金

摘要 高熵合金 (HEAs) 是一类具有良好性能的合金，包括增强的耐辐照性、高温强度和耐腐蚀性。然而，它们存在于一个相对未开发的准无限组合空间区域。因此，为了能够开发出有前景的成分复杂的合金，例如 HEAs，需要高通量方法。在这项工作中开发和展示了这种高通量能力。通过增材制造的原位合金化被用来生产不同 HEA 成分的阵列。然后通过扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDS) 和 X 射线衍射 (XRD) 对样品阵列进行表征，所有这些都保留在构建板上。每个样品的顶面在成分上是均匀的，由 EDS 确定，每个样品都显示出单相、无序的晶体结构，如 XRD 所确定。PHA 酶图计算 (CALPHAD) 模型用于确定每种 HEA 组合物在较低温度下的平衡相，并将其结果与 XRD 结果进行比较。在合金开发的背景下讨论了高通量合成技术的影响以及高通量表征和建模技术的耦合。