AlCuCrFeNiMn高熵合金组织及硬度的研究
Study on Microstructure and Hardness of AlCuCrFeNiMn High-entropy Alloy
皮锦红1,2, 潘 冶1, 王章忠2, 袁 波2
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作者单位：1. 东南大学 材料科学与工程学院, 江苏省先进金属材料高技术研究重点实验室, 江苏 南京 211189; 2. 南京工程学院 材料工程学院, 江苏 南京 211167
中文关键字：多主元； 高熵合金； 组织； 硬度
英文关键字：multi-principal elements; high-entropy alloy; microstructure; hardness
中文摘要：利用真空电弧炉熔铸等摩尔比的AlCuCrFeNiMn多主元高熵合金。 扫描电镜及能谱分析表明，合金的铸态组织是典型的树枝晶， 铜偏聚于枝晶间。 晶间分布着大量微小颗粒，有的颗粒尺寸甚至达到纳米级。AlCuCrFeNiMn高熵合金具有高硬度与耐回火软化特性，铸态硬度为380 HBW， 600 ℃退火2 h后硬度为376 HBW。
英文摘要：The euqui-molar AlCuCrFeNiMn high-entropy alloy (HEA) was synthesized with vacuum arc furnace. The microstructure and elements distribution were investigated by scanning electron microscopy. The results show that the as-cast microstructure of HEA is typical dendrite. The copper segregates to inter-dendrite. A lot of fine particles exist in the interdendrite of HEA, some are even as fine as nano-meter scale. The HEA has high hardness and good thermal stability. The hardness values of the alloy as-cast and obtained by annealing at 600℃ is 380 HBW and 376 HBW respectively.