In this paper, the effect of Al mole ratio on phase evolution, damping capacity and mechanical properties of the AlCrFeNi (indicated by Al, = 0.3, 0.4, 0.5 and 0.7) medium-entropy alloys (MEAs) was investigated. The results show that the structure of the Al MEAs changes from the face-centered cubic (FCC) phase dominated by the Al alloy to the body-centered cubic (BCC) phase dominated by the Al alloy. As the volume fraction of the BCC phase increases the corresponding grain size of the alloys decreases and then increases, which increases the ferromagnetic properties and decreases interfacial area in the Al alloys. The high damping capacity of Al and Al alloys is corresponding to 0.05545, and 0.05044, respectively, under the synergistic effects of ferromagnetic damping and interfacial damping. The special honeycomb-like morphology of FCC phase distributed in the BCC matrix gives the Al alloy the highest damping capacity and yield strength.

中文翻译：

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Al0.5CrFe2Ni中熵合金具有高阻尼能力的特殊微观结构


本文研究了Al摩尔比对AlCrFeNi（以Al表示，= 0.3、0.4、0.5和0.7）中熵合金（MEA）的相演化、阻尼能力和力学性能的影响。结果表明，Al MEA的结构从以铝合金为主的面心立方（FCC）相转变为以铝合金为主的体心立方（BCC）相。随着 BCC 相体积分数的增加，合金的相应晶粒尺寸先减小后增大，从而提高了铝合金的铁磁性能并减小了界面面积。在铁磁阻尼和界面阻尼的协同作用下，铝合金的高阻尼能力分别为0.05545和0.05044。 BCC 基体中分布的 FCC 相的特殊蜂窝状形貌赋予了铝合金最高的阻尼能力和屈服强度。