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Design Fe-based Eutectic Medium-Entropy Alloys Fe2NiCrNbx

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

High-entropy alloys have attracted broad research interests due to their unique and intriguing mechanical properties. As a category of high-entropy alloys, eutectic high-entropy alloys combine the advantages of eutectic and high-entropy alloys, with excellent mechanical properties and casting properties. Some eutectic high-entropy alloys have been developed and shown exciting properties. In this paper, based on the physical metallurgy of eutectic high-entropy alloy, medium-entropy alloy Fe2NiCrNbx was designed. The as-cast alloy is composed of FCC and Laves phases, Nb element promotes the formation of primary Laves phase, and the hardness of the alloy increases with the increase in Nb element. Among the four alloys, the eutectic chemical composition at eutectic point is Fe2NiCrNb0.34; the alloy has a good strength and plastic balance. The ultimate comprehensive strength is 2267MPa, and the fracture strain is 30.8%. The experiment data and analyses identified the eutectic points and the excellent mechanical behavior. Moreover, the expensive Co element was replaced by Fe element. This cheap medium-entropy alloy has promising prospect in the consideration of the cost performance ratio.

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Acknowledgements

This work was financially supported by the National Key R&D Program of China (Grant No. 2018YFB1105804), the Research Fund of the State Key Laboratory of Solidification Processing (NPU), China (Grant No. 2020-TS-06), and the BIAM YiCai Youth Foundation Program (Grant No. KJ53200134).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    Jiafen Song, Zishu Chai, Jian Zheng, Qingfeng Wu, Feng He, Junjie Li, Jincheng Wang, Haiou Yang & Zhijun Wang

  2. Science and Technology On Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing, 100095, China

    Zenan Yang

Authors
  1. Jiafen Song
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  2. Zishu Chai
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  3. Jian Zheng
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  4. Qingfeng Wu
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  5. Feng He
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  6. Zenan Yang
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  7. Junjie Li
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  8. Jincheng Wang
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  9. Haiou Yang
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  10. Zhijun Wang
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Corresponding authors

Correspondence to Haiou Yang or Zhijun Wang.

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Available online at http://link.springer.com/journal/40195.

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Song, J., Chai, Z., Zheng, J. et al. Design Fe-based Eutectic Medium-Entropy Alloys Fe2NiCrNbx. Acta Metall. Sin. (Engl. Lett.) 34, 1103–1108 (2021). https://doi.org/10.1007/s40195-021-01234-0

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  • DOI: https://doi.org/10.1007/s40195-021-01234-0

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