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首页> 外文期刊>Journal of Materials Research >A superfine eutectic microstructure and the mechanical properties of CoCrFeNiMo_x high-entropy alloys
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A superfine eutectic microstructure and the mechanical properties of CoCrFeNiMo_x high-entropy alloys

机译：CoCrFeNiMo_x高熵合金的超细共晶组织和力学性能

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摘要

A series of CoCrFeNiMox (x = 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2) high-entropy alloys were designed to develop a eutectic high-entropy alloy system and to acquire a superfine eutectic structure. The results show that for the CoCrFeNiMox alloys, with the increase of Mo content from 0.2 to 1.2, the microstructures shift from a typical dendrite structure to a hypoeutectic microstructure (x = 0.6), and then to a fully eutectic microstructure (x = 0.8) with a lamellar spacing only 110 nm, and finally culminate in the hypereutectic structure (x = 1.0, x = 1.2). The XRD results show that CoCrFeNiMox alloys have a single FCC phase when x is 0.2 or 0.4. When Mo content is over 0.6, it begins to separate Cr9Mo21Ni20 intermetallic compounds. The hardness of the CoCrFeNiMox alloys is increasing significantly from 172.8 to 763.7 HV with the increase of Mo content. Meanwhile, the fracture strength increased but the ductility decreases. Among these alloys, the CoCrFeNiMo0.6 alloy shows excellent integrated mechanical properties of compressive fracture strength and strain, which are 2051 Mpa and 23%, respectively.
机译：设计了一系列CoCrFeNiMox（x = 0.2、0.4、0.6、0.8、1.0和1.2）高熵合金，以开发低共熔高熵合金体系并获得超细共晶结构。结果表明，对于CoCrFeNiMox合金，随着Mo含量从0.2增加到1.2，其微观结构从典型的枝晶组织转变为亚共晶组织（x = 0.6），然后转变为完全共晶组织（x = 0.8）。层间距仅为110 nm，最终达到过共晶结构（x = 1.0，x = 1.2）。 X射线衍射结果表明，当x为0.2或0.4时，CoCrFeNiMox合金具有单一的FCC相。当Mo含量超过0.6时，它开始分离Cr9Mo21Ni20金属间化合物。随着Mo含量的增加，CoCrFeNiMox合金的硬度从172.8 HV显着提高。同时，断裂强度增加，但延展性降低。在这些合金中，CoCrFeNiMo0.6合金表现出优异的压缩断裂强度和应变综合机械性能，分别为2051 Mpa和23％。

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  • 来源
    《Journal of Materials Research》 |2018年第19期|3258-3265|共8页
  • 作者

    Guo Yong; Liu Liang; Zhang Yue; Qi Jingang; Wang Bing; Zhao Zuofu; Shang Jian; Xiang Jun;

  • 作者单位

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

    Liaoning Univ Technol, Dept Mat Sci & Engn, Jinzhou 121001, Liaoning, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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