本发明涉及高熵合金技术领域,具体涉及一种纳米共格析出强化铸造共晶高熵合金及其制备方法,所述共晶高熵合金成分通式为Al-aCo-bCr-cFe-dNi-eC-f,a、b、c、d、e和f为对应元素的摩尔分数,其中,0.18≤a≤0.20,0.15≤b≤0.22,0≤c≤0.05,0.15≤d≤0.22,0.39≤e≤0.45,0.005≤f≤0.02,且a+b+c+d+e+f＝1,合金包含面心立方和体心立方两种晶体结构,其FCC相中均匀分布有大量的E2-1有序结构的纳米级析出相,屈服强度优于无析出铸造共晶高熵合金和含L1-2析出的铸造共晶高熵合金,解决了现有技术中铸态共晶高熵合金室温拉伸屈服强度较低的问题。

The invention relates to the technical field of high entropy alloy, in particular to a nanometer coelated precipitation enhanced casting eutectic high entropy alloy and a preparation method thereof. The general formula of the eutectic high entropy alloy composition is al-ACo-bCR-Cef-DNI-EC-F, where A, b, c, d, e and f are the mole fraction of the corresponding elements, where 0.18≤a≤0.20,0.1 5≤b≤0.22,0≤c≤0.05,0.15≤d≤0.22,0.39≤e≤0.45,0.005≤f≤0.02, and a+b+c+d+e+f = 1, the alloy contains two crystal structures of face-centered cubic and body-centered cubic, and a large number of E2-1 ordered nanoscale precipitates are uniformly distributed in the FCC phase. The yield strength is better than that of cast eutectic high entropy alloy without precipitation and cast eutectic high entropy alloy containing L1-2 precipitation, which solves the problem of low tensile yield strength at room temperature of cast eutectic high entropy alloy in prior art.