Cu、Co元素对激光烧结CrFeNiAlSi高熵合金组织与性能的影响
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摘要
采用Cr、Fe、Ni、Al、Cu、Co、Si纯金属粉末按照等摩尔比混合并压坯,激光自蔓延烧结制备CrFeNiAlSi、CrFeNiAlCuSi、CrFeNiAlCoSi高熵合金。利用OM、XRD、SEM、显微硬度计及磨粒磨损机等试验表征设备,分析了CrFeNiAlSi、CrFeNiAlCuSi、CrFeNiAlCoSi高熵合金的显微组织、物相及力学性能。结果表明:CrFeNiAlSi高熵合金主要由BCC相组成,为菊花状组织。在加入Cu、Co元素后,从单一的BCC相转化为BCC+FCC两种相共存,但仍以BCC相为主,CrFeNiAlCuSi高熵合金为菊花状+胞状组织,CrFeNiAlCoSi高熵合金为等轴晶组织。加入Cu、Co元素改变了CrFeNiAlSi高熵合金的形貌与性能,加入Cu元素后孔隙减少,硬度下降,磨损率上升。加入Co元素后硬度上升,磨损率下降,显微硬度均值为1010 HV0. 1,磨损率最小为46 mg·cm~(-2)。
The high entropy alloys of CrFeNiAlSi,CrFeNiAlCuSi and CrFeNiAlCoSi were prepared by laser self-propagating sintering,which is mixed and pressed according to equal molar ratio by using Cr,Fe,Ni,Al,Cu,Co and Si pure metal powder. The microstructure,phase and mechanical properties of CrFeNiAlSi,CrFeNiAlCuSi and CrFeNiAlCoSi high entropy alloys were analyzed by means of OM,XRD,SEM,microhardness tester and abrasive wear machine. The results show that CrFeNiAlSi high entropy alloy is composed of BCC phase,and Chrysanthemum like tissue. After the addition of Cu and Co,transition from single BCC phase to BCC + FCC two phase coexistence,but it is still based on BCC phase. CrFeNiAlCuSi high entropy alloy is chrysanthemum like and cellular tissue,CrFeNiAlCoSi high entropy alloy is an equiaxed microstructure. Moreover,the morphology and properties of CrFeNiAlSi high entropy alloy were changed. After adding Cu,the porosity decreases,the hardness decreases,and the wear rate increases after adding Cu and Co element. After adding Co,the hardness increases,the wear rate decreases,the mean microhardness is 1010 HV0. 1,and the wear rate is 46 mg·cm~(-2).
The high entropy alloys of CrFeNiAlSi,CrFeNiAlCuSi and CrFeNiAlCoSi were prepared by laser self-propagating sintering,which is mixed and pressed according to equal molar ratio by using Cr,Fe,Ni,Al,Cu,Co and Si pure metal powder. The microstructure,phase and mechanical properties of CrFeNiAlSi,CrFeNiAlCuSi and CrFeNiAlCoSi high entropy alloys were analyzed by means of OM,XRD,SEM,microhardness tester and abrasive wear machine. The results show that CrFeNiAlSi high entropy alloy is composed of BCC phase,and Chrysanthemum like tissue. After the addition of Cu and Co,transition from single BCC phase to BCC + FCC two phase coexistence,but it is still based on BCC phase. CrFeNiAlCuSi high entropy alloy is chrysanthemum like and cellular tissue,CrFeNiAlCoSi high entropy alloy is an equiaxed microstructure. Moreover,the morphology and properties of CrFeNiAlSi high entropy alloy were changed. After adding Cu,the porosity decreases,the hardness decreases,and the wear rate increases after adding Cu and Co element. After adding Co,the hardness increases,the wear rate decreases,the mean microhardness is 1010 HV0. 1,and the wear rate is 46 mg·cm~(-2).
引文
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[2]Zhang Weiran,Liaw Peter K,Zhang Yong.Science and technology in high-entropy alloys[J].Science China Materials,2018,61(1):2-22.
[3]Liang X B,Guo W,Chen Y X,et al.Microstructure and mechanical properties of Fe CrNiCoCu(B)high-entropy alloy coatings[J].Materials Science Forum,2011,694(7):502-507.
[4]隋艳伟,陈霄,戚继球,等.多主元高熵合金的研究现状与应用展望[J].功能材料,2016,47(5):50-54.Sui Yanwei,Chen Xiao,Qi Jiqiu,et al.Research progress of highentropy alloys with multi-principal elements and its prospective application[J].Journal of Functional Materials,2016,47(5):50-54.
[5]Zhang Y,Zuo T T,Tang Z,et al.Microstructures and properties of high-entropy alloys[J].Progress in Materials Science,2014,61:1-93.
[6]朱海云,孙宏飞,李业超.多主元高熵合金的研究现状与发展[J].新材料产业,2008(9):67-70.Zhu Haiyun,Sun Hongfei,Li Yechao.Research progress and development of high-entropy alloys with multi-principal elements[J].Advanced Materials Industry,2008(9):67-70.
[7]Zhang Y,Lu Z P,Ma S G,et al.Guidelines in predicting phase formation of high-entropy alloys[J].Mrs Communications,2014,4(2):57-62.
[8]Roy U,Roy H,Daoud H,et al.Fracture toughness and fracture micromechanism in a cast Al CoCrCuFeNi high-entropy alloy system[J].Materials Letters,2014,132:186-189.
[9]Cheng J B,Liang X B,Xu B S.Effect of Nb addition on the structure and mechanical behaveiors of CoCrCuFeNi high-entropy alloy coatings[J].Surface and Coatings Technology,2013,240(7):184-190.
[10]Wei L,Ping L,Liaw P K.Microstructures and properties of highentropy alloy films and coatings:a review[J].Materials Research Letters,2018,6(4):199-229.
[11]Poulia A,Georgatis E,Lekatou A,et al.Microstructure and wear behavior of a refractory high entropy alloy[J].International Journal of Refractory Metals and Hard Materials,2016,57:50-63.
[12]刘用,马胜国,刘英杰,等.AlxCrCuFeNi2多主元高熵合金的摩擦磨损性能[J].材料工程,2018,46(2):99-104.Liu Yong,Ma Shengguo,Liu Yingjie,et al.Friction and wear properties of AlxCrCuFeNi2high-entropy alloys with multi-principalelements[J].Journal of Materials Engineering,2018,46(2):99-104.
[13]农智升,李宏宇,王继杰.Al CrFeNiTi高熵合金热稳定性的研究[J].稀有金属材料与工程,2018,47(1):191-196.Nong Zhisheng,Li Hongyu,Wang Jijie.Thermal stability of Al CrFeNiTi high entropy alloy[J].Rare Metal Materials and Engineering,2018,47(1):191-196.
[14]Sun S J,Tian Y Z,Lin H R,et al.Enhanced strength and ductility of bulk CoCrFeMnNi high entropy alloy having fully recrystallized ultrafine-grained structure[J].Materials and Design,2017,133:122-127.
[15]Wang J,Li J,Wang J,et al.Effect of solidification on microstructure and properties of Fe CoNi(Al Si)0.2high-entropy alloy under strong static magnetic field[J].Entropy,2018,20(4):275-287.
[16]Mohanty S,Maity T N,Mukhopadhyay S,et al.Powder metallurgical processing of equiatomic Al CoCrFeNi high entropy alloy:Microstructure and mechanical properties[J].Materials Science and Engineering A,2017,679:299-313.
[17]Anil K,Akhilesh K S,Manoj C.Phase evolution and mechanical properties of AlCoCrFeNiSixhigh-entropy alloys synthesized by mechanical alloying and spark plasma sintering[J].Journal of Materials Engineering and Performance,2018,27(7):3304-3314.
[18]温立哲,黄元盛.Al2CoCrCu1/2Fe Mo Ni Ti高熵合金粉末制备及其性能研究[J].金属功能材料,2016,23(4):44-47.Wen Iizhe,Huang Yuansheng.Study on preparation of Al2CoCrCu1/2Fe Mo Ni Ti high-entropy alloy powder and its property[J].Metallic Functional Materials,2016,23(4):44-47.
[19]张廷安,赵亚平,杨欢,等.自蔓延高温合成的研究进展[J].材料导报,2001,15(9):5-8.Zhang Tingan,ZhaoYaping,Yang Huan,et al.Progress in research on self propagating high temperature synthesis[J].Materials Review,2001,15(9):5-8.
[20]房伟峰.CuCrFeNiMn基高熵合金的微观组织和耐腐蚀性能研究[D].郑州:郑州大学,2014.
[21]Zhang Y,Zuo T T,Tang Z,et al.Microstructures and properties of high-entropy alloys[J].Progress in Material Science,2014,61(8):1-93.
[22]Zhao Y J,Qiao J W,Ma S G,et al.A hexagonal close-packed highentropy alloy:The effect of entropy[J].Material and Design,2016,96(4):10-15.
[23]Zhang Y,Zhou Y J,Lin J,et al.Solid-solution phase formation rules for multi-component alloys[J].Advanced Engineering Materials,2010,10(6):534-538.
[24]Swalin,Richard A.Thermodynamics of Solids[M].Wiley,1962.
[25]Munir Z A,Anselmi-Tamburini U.Self-propagation exothermic reaction:The synthesis of high temperature materials by combustion[J].Materials Science Reports,1989,3(7):277-365.
[26]祝金明.Si、C、Cu和Mo元素对Al CoCrFeNi高熵合金结构与性能的影响[D].沈阳:中国科学院金属研究所,2011.
[27]阳隽觎,周云军,张勇,等.无基元高混合熵合金形成固溶体结构三原则[J].中国材料科技与设备,2007,4(5):61-63.Yang Junyu,Zhou Yunjun,Zhang Yong,et al.Soild solution formation criteria in the multi-component alloys with high entropy mixing[J].Chinese Materials Science Technology and Equipment,2007,4(5):61-63.
[28]Takeuchi A,Inoue A.Classification of bulk metallic glasses by atomic size difference,heat of mixing and period of constituent elementsand its application to characterization of the main alloying element[J].Materials Transactions,2005,46(12):2817-2829.
[29]Hsu Y J,Chiang W C,Wu J K.Corrosion behavior of Fe CoNiCrCux high-entropy alloys in 3.5%sodium chloride solution[J].Materials Chemistry and Physics,2005,92(1):112-117.
[30]Zhang Y,Lu Z P,Ma S G,et al.Guidelines in predicting phase formation of high-entropy alloys[J].Mrs Communications,2014,4(2):57-62.
[31]Wang X F,Zhang Y,Qiao Y,et al.Novel microstructure and properties of multicomponent CoCrCuFeNiTixalloys[J].Intermetallics,2007,15(3):357-362.
[32]史秀丽,王灿明,孙宏飞,等.元素Cu对CuxAlFeNiCrTi(x=0,0.5,1.0)高熵合金组织性能的影响[J].材料保护,2018,51(1):58-61.Shi Xiuli,Wang Canming,Sun Hongfei,et al.Effects of Cu element on microstructure and properties of CuxAlFeNiCrTi(x=0,0.5,1.0)high-entropy alloys[J].Materials Protection,2018,51(1):58-61.