Ni含量对AlCrCuNi_xTi高熵合金微观组织和硬度的影响
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摘要
采用电弧熔炼工艺制备了AlCrCuNi_xTi(x=0.2、0.4、0.6、1.0)高熵合金,采用X射线衍射分析(XRD)、带EDS分析仪的扫描电镜(SEM)和显微硬度计对合金的物相结构、微观组织形貌、元素分布和硬度进行了分析。结果表明,当x=0.2、0.4和0.6时,合金物相主要由FCC1、FCC2和BCC相组成,当x=1.0时,合金物相主要由FCC1和FCC2相组成。合金硬度随Ni含量的增加而逐渐减小,其硬度(HV)由430降低至386。
The AlCrCuNi_xTi(x=0.2,0.4,0.6,1.0)high entropy alloys were prepared by arc melting process.The phase,microstructure,elemental distribution and hardness of the alloys were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and digital display Vickers hardness tester.The results show that the alloys are composed of a mixed structure of FCC1,FCC2 and BCC phases when the x=0.2,0.4 and 0.6.As the x=1.0,the alloys consist of FCC1 and FCC2 phases.The hardness of the alloys is decreased gradually from430 HV to 386 HV with the increase of Ni content.
The AlCrCuNi_xTi(x=0.2,0.4,0.6,1.0)high entropy alloys were prepared by arc melting process.The phase,microstructure,elemental distribution and hardness of the alloys were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and digital display Vickers hardness tester.The results show that the alloys are composed of a mixed structure of FCC1,FCC2 and BCC phases when the x=0.2,0.4 and 0.6.As the x=1.0,the alloys consist of FCC1 and FCC2 phases.The hardness of the alloys is decreased gradually from430 HV to 386 HV with the increase of Ni content.
引文
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[4]YEH J W.Recent progress in high-entropy alloys[J].Annales de Chimie-Science Des Materiaux,2006,31(6):633-648.
[5]RANGANATHAN S.Alloyed pleasures:Multimetallic cocktails[J].Current Science,2003,85(10):1 404-1 406.
[6]TONG S J,CHEN M R,CHEN S K,et al.Mechanical performance of the AlxCoCrCuFeNi high-entropy alloy system with multiprincipal elements[J].Metallurgical and Materials Transaction,2005,A36:1 263-1 271.
[7]ZHANG K B,FU Z Y,WANG W M,et al.Microstructure and mechanical properties of CoCrFeNiTiAlx high-entropy alloys[J].Materials Science and Engineering,2009,A508(1-2):214-219.
[8]WANG X F,ZHANG Y,QIAO Y,et al.Novel microstructure and properties of multicomponent CoCrCuFeNiTix alloys[J].Intermetallics,2007,15(3):357-362.
[9]陈敏,刘源,李言祥,等.多主元高熵合金AlTiFeNiCuCrx微观结构和力学性能[J].金属学报,2007,43(10):1 020-1 024.
[10]任波,郭鹏,赵瑞锋,等.CrxCuFe2Mo0.5Nb0.5Ni2高熵合金的微观组织与力学性能[J].特种铸造及有色合金,2014,34(6):569-573.
[11]张国玺,任波,赵瑞锋,等.时效处理对CuxCrFeNiAl高熵合金组织与硬度的影响[J].特种铸造及有色合金,2015,35(4):440-443.
[12]PI J H,PAN Y,ZHANG H,et al.Microstructure and properties of AlCrFeCuNix(0.6≤x≤1.4)high-entropy alloys[J],Materials Science and Engineering,2012,A534:228-233.
[13]ZHANG Y,ZUO T T,TANG Z,et al.Microstructure and properties of high-entropy alloy[J].Progress in Materials Science,2014,61:1-93.
[14]ZHANG Y,ZHOU Y,HUI X,et al.Minor alloying behavior in bulk metallic glasses and high entropy alloy[J].Science in China,2008,G51:427-437.
[15]GUO S,NG C,LU J,et al.Effect of valence electron concentration on stability of fcc and bcc phase in high entropy alloy[J].Journal of Applied Physics,2011,109:103505.
[16]POLETTI M G,FIORE G,SZOST B A,et al.Search for high entropy alloys in the X-NbTaTiZr systems(X=Al,Cr,V,Sn)[J].Journal of Alloys and Compounds,2015,620:283-288.
[17]YANG X,ZHANG Y.Prediction of high-entropy stabilized solid solution in multi-component alloys[J].Materials Chemistry and Physics,2012,132:233-238.
[18]TAKEUCHI A,INOUE A.Quantitative evaluation of critical cooling rate for metallic glasses[J].Materials Science and Engineering,2001,A304-306:446-451.
[19]GUO S,LIU C T.Phase stability in high entropy alloys:Formation of solid solution phase and amorphous phase[J].Progress in Natural Science Materials International,2015,211(21):433-446.
[20]LIU C,PENG W Y,JIANG C S,et al.Composition and phase structure dependence of mechanical and magnetic properties for AlCoCuFeNixhigh entropy alloys[J].Journal of Materials Science and Technology,2019,35:1 175-1 183.