Cr对Al-Cr-Cu-Fe-Ni高熵合金组织与硬度的影响  

Effect of Cr on Microstructure and Hardness of AlCrxCuFeNi High-entropy Alloy System

作　　者：李安敏[1] 张喜燕[2] 

机构地区：[1]广西大学材料科学与工程学院,南宁530004 [2]重庆大学材料科学与工程学院,重庆400030

出　　处：《有色金属》2009年第4期18-20,共3页Nonferrous Metals

基　　金：有色金属及材料加工新技术教育部重点实验室开放基金资助项目(GXKFJ-16);广西自然科学基金资助项目(0575-18);广西技术攻关项目(0639003);广西大学科研基金资助项目(x071066)

摘　　要：研究Cr含量对AlCrxCuFeNi(x=0.5,1.0,1.5,2.0)合金的组织与硬度的影响。利用真空电弧炉熔铸AlCrxCuFeNi高熵合金,通过金相显微镜与X射线衍射分析合金的显微结构,用显微硬度仪检测合金的显微硬度。结果表明,合金的铸态组织是典型的树枝晶,AlCrxCuFeNi高熵合金具有面心立方(FCC)和体心立方结构(BCC);AlCrxCuFeNi(x=0.5,1.0)的硬度随Cr含量的增加而增加,AlCr1.5CuFeNi的硬度降低,AlCr2.0CuFeNi的硬度又回升。高熵效应使AlCrxCuFeNi合金具有简单的晶体结构,Cr含量对AlCrxCuFeNi合金的硬度影响是晶体结构、固溶强化和晶格畸变因素综合作用结果。The effect of Cr content on the microstructure and hardness ofhigh-entropy alloy AlCrxCuFeNi（x=0.5,1.0,1.5,2.0） are investigated.The alloys are prepared by the arc melting and casting method.The microstructures of alloys are analyzed by microscope and X-ray diffractometer.The hardness is measured by a Vickers hardness tester.The results show that Al CrxCuFeNi alloys exhibit quite simple FCC and BCC solid solution phases.The hardness of alloys is increased with the increase of Cr content from 0.5 to 2.0 whereas it is minimal as the content of Cr is 1.5. AlCr CuFeNi alloys exhibit quite simple solid solution phases because of high entropy, and the effect of Cr on the hardness of AlCr CuFeNi high-entropy alloy system results from the basic structure factor, solution hardening mechanism and lattice distortion.

关 键 词：金属材料 多主元合金 高熵合金 组织 硬度 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]