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共晶高熵合金

晋玺 乔珺威

晋玺, 乔珺威. 共晶高熵合金[J]. 金属世界, 2023 (6): 11-15. doi: 10.3969/j.issn.1000-6826.2023.10.1885
引用本文: 晋玺, 乔珺威. 共晶高熵合金[J]. 金属世界, 2023 (6): 11-15. doi: 10.3969/j.issn.1000-6826.2023.10.1885
Xi JIN, Junwei QIAO. Eutectic High Entropy Alloys[J]. Metal World, 2023 (6): 11-15. doi: 10.3969/j.issn.1000-6826.2023.10.1885
Citation: Xi JIN, Junwei QIAO. Eutectic High Entropy Alloys[J]. Metal World, 2023 (6): 11-15. doi: 10.3969/j.issn.1000-6826.2023.10.1885

共晶高熵合金

doi: 10.3969/j.issn.1000-6826.2023.10.1885
基金项目: 山西省应用基础研究计划资助项目(20210302124427)
详细信息
    作者简介:

    晋玺(1991—),男,山西省运城市人,太原理工大学材料科学与工程学院讲师。2020年毕业于哈尔滨工业大学材料科学与工程学院,主要研究方向:共晶材料的变形与强韧化研究。通信地址:山西省太原市迎泽西大街79号太原理工大学;E-mail:jinxi@tyut.edu.cn

Eutectic High Entropy Alloys

  • 摘要: 共晶合金是工业上广泛应用的一类铸造合金,具有优异的充型能力、机械性能、组织均匀性以及稳定性等。统计发现,大约70%的传统二元合金中存在着共晶转变,所形成的共晶合金大多性能较差,这主要受限于其固定的共晶点、相体积分数以及有限的相组成。相较于传统共晶合金,共晶高熵合金含有更多的组成元素,同时共晶成分由一个点扩展为一定的成分区间,因而力学性能、物理性能以及化学性能具有更大的调控范围,具有更广阔的应用前景。
  • 图  1  铸件实物图:(a)纯金龙首兽纹带钩;(b) Al–Si共晶合金浇铸的发动机缸体;(c)西周晋侯的青铜器鸟尊

    图  2  Pb–Sn合金共晶相图

    图  3  典型共晶材料及应用[2]

    图  4  将Ni–Cr二元共晶扩充至多组元共晶高熵合金的示意图[1]

    图  5  (a) 3类共晶高熵合金及部分非共晶成分高熵合金的铸态拉伸性能对比;(b)共晶高熵合金的典型层片状组织

    图  6  超细晶异质AlCoCrFeNi2.1共晶高熵合金组织图:(a)扫描组织照片;(b)背散射电子衍射图;(c)扫描透射显微照片;(d)图6(c)中蓝色方框区域的显微组织示意图[5]

  • [1] Jin X, Xue Z, Mao Z Z, et al. Exploring multicomponent eutectic alloys along an univariant eutectic line. Mat Sci Eng A, 2023, 877: Art No. 145136
    [2] 傅恒志. 先进材料定向凝固. 北京: 科学出版社, 2008
    [3] Lu Y P, Dong Y, Guo S, et al. A promising new class of high-temperature alloys: eutectic high-entropy alloys. Sci Rep, 2014, 4: Art No. 6200
    [4] Lu Y P, Gao X Z, Jiang L, et al. Directly cast bulk eutectic and near-eutectic high entropy alloys with balanced strength and ductility in a wide temperature range. Acta Mater, 2017, 124: 143 doi: 10.1016/j.actamat.2016.11.016
    [5] Shi P J, Ren W L, Zheng T X, et al. Enhanced strength-ductility synergy in ultrafine-grained eutectic high-entropy alloys by inheriting microstructural lamellae. Nat Commun, 2019, 10: Art No. 489
    [6] Shi P J, Li R G, Li Y, et al. Hierarchical crack buffering triples ductility in eutectic herringbone high-entropy alloys. Science, 2021, 373(6557): 912 doi: 10.1126/science.abf6986
    [7] He F, Wang Z J, Shang X L, et al. Stability of lamellar structures in CoCrFeNiNbx eutectic high entropy alloys at elevated temperatures. Mater Design, 2016, 104: 259 doi: 10.1016/j.matdes.2016.05.044
    [8] Zhang B, Gao M C, Zhang Y, et al. Senary refractory high-entropy alloy CrxMoNbTaVW. Calphad, 2015, 51: 193 doi: 10.1016/j.calphad.2015.09.007
    [9] Jin X, Zhou Y, Zhang L, et al. A new pseudo binary strategy to design eutectic high entropy alloys using mixing enthalpy and valence electron concentration. Mater Design, 2018, 143: 49 doi: 10.1016/j.matdes.2018.01.057
    [10] Lu Y P, Jiang H, Guo S, et al. A new strategy to design eutectic high-entropy alloys using mixing enthalpy. Intermetallics, 2017, 91: 124 doi: 10.1016/j.intermet.2017.09.001
    [11] Han L L, Xu X D, Li Z M, et al. A novel equiaxed eutectic high-entropy alloy with excellent mechanical properties at elevated temperatures. Mater Res Lett, 2020, 8(10): 373 doi: 10.1080/21663831.2020.1772395
    [12] Chen X, Qi J Q, Sui Y W, et al. Effects of aluminum on microstructure and compressive properties of Al–Cr–Fe–Ni eutectic multi-component alloys. Mat Sci Eng A, 2017, 681: 25 doi: 10.1016/j.msea.2016.11.019
    [13] Gao X Z, Lu Y P, Zhang B, et al. Microstructural origins of high strength and high ductility in an AlCoCrFeNi21 eutectic high-entropy alloy. Acta Mater, 2017, 141: 59 doi: 10.1016/j.actamat.2017.07.041
    [14] Chen J X, Li T, Chen Y, et al. Ultra-strong heavy-drawn eutectic high entropy alloy wire. Acta Mater, 2023, 243: Art No. 118515
    [15] Wu Q F, He F, Li J J, et al. Phase-selective recrystallization makes eutectic high-entropy alloys ultra-ductile. Nat Commun, 2022, 13: Art No. 4697
    [16] Shuang S, Ding Z Y, Chung D, et al. Corrosion resistant nanostructured eutectic high entropy alloy. Corros Sci, 2020, 164: Art No. 108315
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  • 刊出日期:  2023-11-24

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