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首页> 外文期刊>Materials Science and Engineering >Microstructures and compressive properties of NiAl-Cr(Mo) and NiAl-Cr eutectic alloys with different Fe contents
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Microstructures and compressive properties of NiAl-Cr(Mo) and NiAl-Cr eutectic alloys with different Fe contents

机译：Fe含量不同的NiAl-Cr（Mo）和NiAl-Cr共晶合金的组织与压缩性能

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摘要

Microstructures and compressive properties of NiAl-Cr(Mo) and NiAl-Cr eutectic alloys with different Fe contents were investigated. The result indicates that a fully eutectic structure is obtained in NiAl-Cr(Mo)-xFe (x = 5, 10 at %) alloys. When the Fe content increases to 15, 20 and 25 at%, the primary dendrite Cr(Mo) including (Ni, Al)-rich precipitate emerges, and the volume fraction of primary dendrite Cr(Mo) gradually increases. Moreover, the needle-like precipitate occurs in NiAl phase of NiAl-Cr(Mo)-25Fe alloy. The deep etching reveals that the precipitate in NiAl phase is not needle-like but plate-like, and it is identified as the abundant Fe-contained Cr(Mo) phase. In NiAl-Cr-xFe alloys, only NiAl-34Cr-2Fe alloy shows the similar fully eutectic structure to NiAl-34Cr eutectic alloy. When the Fe content increases to 4, 6, 8 and 10 at%, the primary dendrite NiAl including Cr-rich precipitate emerges, and the volume fraction of primary dendrite NiAl gradually increases. Moreover, the halo of alpha-Cr phase around the primary dendrite NiAl occurs. Moreover, the addition of 5 at%Fe significantly improves the compressive property of NiAl-Cr(Mo) eutectic alloy. When the Fe content increase further, the compressive strength decreases. However, the addition of Fe does not improve the compressive property of NiAl-Cr eutectic alloy but deteriorate it. The relevant discussion is done.
机译：研究了不同Fe含量的NiAl-Cr（Mo）和NiAl-Cr共晶合金的组织和压缩性能。结果表明，在NiAl-Cr（Mo）-xFe（x = 5，10 at％）合金中获得了完全的共晶结构。当Fe含量增加到15、20和25at％时，包括（Ni，Al）富集的初生枝晶Cr（Mo）出现，初生枝晶Cr（Mo）的体积分数逐渐增加。此外，在NiAl-Cr（Mo）-25Fe合金的NiAl相中出现针状沉淀。深腐蚀表明，NiAl相中的析出物不是针状而是板状，并且被确定为富含Fe的Cr（Mo）相。在NiAl-Cr-xFe合金中，只有NiAl-34Cr-2Fe合金显示出与NiAl-34Cr共晶合金相似的完全共晶组织。当Fe含量增加至4、6、8和10at％时，出现包括富Cr沉淀物的初生枝晶NiAl，并且初生枝晶NiAl的体积分数逐渐增加。此外，在初级枝晶NiAl周围出现α-Cr相的晕圈。此外，添加5at％Fe可以显着改善NiAl-Cr（Mo）共晶合金的压缩性能。当Fe含量进一步增加时，抗压强度降低。但是，添加Fe并不能改善NiAl-Cr共晶合金的压缩性能，反而会使其劣化。相关讨论已经完成。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|593-603|共11页
  • 作者

    Wang Lei; Yao Chengli; Shen Jun; Zhang Yunpeng; Wang Tao; Xu Hengxin; Gao Luhan; Zhang Guojun;

  • 作者单位

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

    Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China;

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  • 关键词

    NiAl-Cr(Mo) eutectic alloy; Casting; Microstructure; Compressive property;

    机译：NiAl-Cr（Mo）共晶合金;铸造;显微组织;压缩性能;

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