AlNiFeCuCoCrV_x高熵合金的显微组织与力学性能
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摘要
利用WK-Ⅱ型非自耗真空电弧炉熔炼制备AlNiFeCuCoCrVx(x=0,0.1,0.2,0.3,0.4,0.5,原子比)高熵合金,研究了其显微组织和力学性能。结果表明:试验合金的组织均为典型树枝晶结构,由面心立方(FCC)结构固溶体、体心立方(BCC)结构固溶体和金属间化合物相组成,添加钒元素后析出了Fe_2AlV相,该相主要分布于枝晶中;随着钒含量的增加,合金的硬度先增后降再增;添加钒对合金的压缩性能不利,合金的抗压强度随钒含量的增加先降后增再降。
AlNiFeCuCoCrVx(x=0,0.1,0.2,0.3,0.4,0.5,atomic ratio)high-entropy alloys were prepared by smelting in a WK-Ⅱtype non-consumable vacuum arc furnace.The microstructures and mechanical properties of the alloys were studied.The results show that the microstructures of all the tested alloys had a typical dendritic structure,consisting of face-centered cubic(FCC)solid solution,body-centered cubic(BCC)solid solution and intermetallic compound phases.With the addition of vanadium,Fe2 AlV phase precipitated and mainly distributed in the dendrites.With increasing vanadium content,the hardness of the alloy increased first,then decreased and then increased.The addition of vanadium was not good for the compressive property of the alloy.Moreover,with increasing vanadium content,the compressive strength decreased first,then increased,and then decreased.
AlNiFeCuCoCrVx(x=0,0.1,0.2,0.3,0.4,0.5,atomic ratio)high-entropy alloys were prepared by smelting in a WK-Ⅱtype non-consumable vacuum arc furnace.The microstructures and mechanical properties of the alloys were studied.The results show that the microstructures of all the tested alloys had a typical dendritic structure,consisting of face-centered cubic(FCC)solid solution,body-centered cubic(BCC)solid solution and intermetallic compound phases.With the addition of vanadium,Fe2 AlV phase precipitated and mainly distributed in the dendrites.With increasing vanadium content,the hardness of the alloy increased first,then decreased and then increased.The addition of vanadium was not good for the compressive property of the alloy.Moreover,with increasing vanadium content,the compressive strength decreased first,then increased,and then decreased.
引文
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[3]贺飞.锻造和轧制对CoCrFeNiMn五元高熵合金组织结构和力学性能的影响[D].大连:大连理工大学,2016:5-13.
[4]YEH J W,CHEN S K,LIN S J,et al.Nanostructured highentropy alloys with multiple principal elements:Novel alloy design concepts and outcomes[J].Advanced Engineering Materials,2004,6(5):299-303.
[5]TSAI K Y,TSAI M H,YEH J W.Sluggish diffusion in CoCr-Fe-Mn-Ni high-entropy alloys[J].Acta Materialia,2013,61(13):4887-4897.
[6]OTTO F,YANG Y,BEI H,et al.Relative effects of enthalpy and entropy on the phase stability of equiatomic highentropy alloys[J].Acta Materialia,2013,61(7):2628-2638.
[7]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):1020-1024.
[8]刘源,李言祥,陈祥,等.多主元高熵合金研究进展[J].材料导报,2006,20(4):4-6.
[9]李安敏,张喜燕,刘乐林,等.退火对AlCrFeCoNiCu高熵合金组织与性能的影响[J].机械工程材料,2012,36(7):14-16.
[10]谢红波,刘贵仲,郭景杰,等.AlFeCrCoCu多组元高熵合金组织与性能的研究[J].稀有金属与硬质合金,2015,43(3):33-39.
[11]张勇.非晶和高熵合金[M].北京:科学出版社,2010.
[12]赵亚光,梅虎,戴品强,等.Ti0.5AlCoFeNiCrx高熵合金的微观组织结构与力学性能[J].材料科学与工程学报,2010,28(5):753-756.
[13]刘贵仲,李伟,罗晓艳,等.AlFeCuCoNiCrTix高熵合金的退火组织及硬度变化[J].材料导报,2009,23(12):51-54.
[14]邵霞,张云鹏,周航.粉末冶金制备AlCrFeNixCoCuTi高熵合金的组织及性能研究[J].铸造技术,2013,34(3):283-285.
[15]王春伟,唐健江,欧子义,等.AlCoCrCuFeNix高熵合金的压缩性能及断口分析[J].特种铸造及有色合金,2011,31(3):201-203.
[16]ZHU Z G,MA K H,YANG X,et al.Annealing effect on the phase stability and mechanical properties of(FeNiCrMn)(100-x)Coxhigh entropy alloys[J].Journal of Alloys and Compounds,2017,695:2945-2950.
[17]刘亮,齐锦刚,王冰,等.CoCrFeNiVx高熵合金的组织与力学性能[J].特种铸造及有色合金,2015,35(11):1130-1133.
[18]LI B S,WANG Y P,REN M X,et al.Effects of Mn,Ti and V on the microstructure and properties of AlCrFeCoNiCu high entropy alloy[J].Materials Science and Engineering:A,2008,498(1/2):482-486.
[19]TAKEUCHI A,INOUE A.Classification of bulk metallic glasses by atomic size difference,heat of mixing and period of constituent elements and its application to characterization of the main alloying element[J].Materials Transactions,2005,46(12):2817-2829.
[20]梁广川,刘文西.FeAl合金研究进展评述[J].材料导报,1999,13(2):25-26.
[21]王峰,奚正平,汤慧萍,等.Fe-Al合金多孔材料研究进展[J].粉末冶金技术,2010,28(6):463-466.
[22]FERREIRS P A,ALONSO P R,GOMEZ G R,et al.Impact toughness transition temperature of ferritic Fe-Al-Valloy with strengthening Fe2AlV precipitates[J].Materials Science and Engineering:A,2017,706:136-141.
[23]FERREIRS P A,ALONSO P R,GARGANO P H,et al.Phase transformations in Fe1-2xAlxVx(x≤0.15)alloys[J].Procedia Materials Science,2015,8:994-1003.