多主元合金AlCrMnNiCuFe_x组织与性能研究

Microstructure and Properties of Multi-principal Elements Alloy AlCrMnNiCuFe_x

利用真空管式高温炉和真空电弧炉制得AlCrMnNiCuFex(x=0,0.5,1.0,1.5,2.0)多主元合金试样,并对其组织、耐蚀性和硬度进行研究。分析表明:AlCrMnNiCuFe2.0的组织最简单,组成相数远低于平衡相率所预期的相数。AlCrMnNiCuFe的晶内有纳米级颗粒析出。x由0增加到2.0,AlCrMnNiCuFex合金的硬度逐渐升高。由真空电弧炉熔炼所得铸态AlCrMnNiCuFe的晶粒比真空管式高温炉条件下所得的AlCrMnNiCuFe晶粒更细小,硬度也远高于后者。AlCrMnNiCuFe的耐蚀性优于AlCrMnNiCu。在非等摩尔比的AlCrMnNiCuFex合金系中,x越大,合金耐蚀性越好;AlCrMnNiCuFe2.0合金组织在600℃以下稳定。

A series of multi-principal elements alloy AlCrMnNiCuFex（x=0,0.5,1.0,1.5,2.0） were prepared by high temperature vacuum tube furnace and vacuum arc furnace respectively.The microstructure,corrosion resistance and hardness of alloys were investigated.The results show that AlCrMnNiCuFe2.0 has the simplest microstructure whose phase number is far less than that in equilibrium.Nano-particles separate from the dendrites.The hardness of AlCrMnNiCuFex increases as x increases from 0 to 2.0.The grains of as-cast AlCrMnNiCuFe prepared by vacuum arc furnace are finer than that of high temperature vacuum tube furnace,while the hardness is much higher.AlCrMnNiCuFe is more corrosion resistant than AlCrMnNiCu.Among non-equi-mole alloys AlCrMnNiCuFex,the corrosion resistance increases with x.The microstructure of AlCrMnNiCuFe2.0 is stable if the treating temperature is not above 600℃.