The present study deals with the fabrication of a novel AlCoMoFeNi high-entropy (HEA) alloy using mechanical alloying techniques. The developed HEA was characterized by X-ray diffraction, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) equipped with energy dispersive x-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The crystallite size of the high-entropy alloy solid solution was determined to be 20 ± 1 nm, with a lattice strain of 0.467 ± 0.03 % and a lattice parameter of 3.98 ± 0.08 Å. A number of characteristics, including melting point, mixing enthalpy change, mixing entropy change, atomic size difference, electronegativity difference, and valence electron concentration, were computed in order to ascertain the conditions regulating the formation of high-entropy alloys. A HEA with BCC and FCC solid solution was obtained after mechanical alloying, which was confirmed by experimental findings as well as thermodynamic calculations.

中文翻译：

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机械合金化等原子AlCoMoFeNi高熵合金的显微组织表征及相演化

本研究涉及使用机械合金化技术制造新型 AlCoMoFeNi 高熵 (HEA) 合金。所开发的 HEA 通过 X 射线衍射、差示扫描量热法 (DSC)、配备能量色散 X 射线光谱 (EDX) 的扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 进行表征。高熵合金固溶体的晶粒尺寸为20±1 nm，晶格应变为0.467±0.03%，晶格参数为3.98±0.08 Å。计算了许多特征，包括熔点、混合焓变、混合熵变、原子尺寸差异、电负性差异和价电子浓度，以确定调节高熵合金形成的条件。机械合金化后得到了具有BCC和FCC固溶体的HEA，并通过实验结果和热力学计算得到证实。