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Effect of Ti on the Microstructure and Mechanical Properties of AlCrFeNiTix Eutectic High-Entropy Alloys

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Abstract

High-entropy alloys (HEAs) have become important candidates for structural materials of nuclear reactors because of their excellent mechanical properties and irradiation resistance. Recently, eutectic HEAs (EHEAs) have exhibited improved properties by double-phase strengthening. In this study, the effect of Ti on the microstructure and mechanical properties of the EHEAs AlCrFeNi was investigated. Results show that the eutectic microstructure consisted of a disordered body-center cubic (A2) phase and an ordered body-center cubic (B2) phase. Smaller nanoparticles were formed with Ti addition. Ti significantly influenced the microstructure of AlCrFeNi, thus changing the mechanical properties of AlCrFeNi. The compressive strength of AlCrFeNi increased, and the toughness of AlCrFeNi decreased with the increase in Ti content. The application of AlCrFeNiTi0.2 alloy is promising because of its high mechanical properties and superior specific strength. In addition, the AlCrFeNiTix alloys showed great softening resistance at a high temperature (500 °C).

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Acknowledgments

This work was supported by China Postdoctoral Science Foundation (Grant No. 2020M671488), the Fundamental Research Funds for the Central Universities (Grant No. NS2021036), Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 2021K222B), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX20_0196).

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Authors and Affiliations

  1. Department of Nuclear Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China

    Songyuan Li, Feida Chen, Xiaobin Tang, Guojia Ge, Zhangjie Sun & Zhenlong Geng

  2. Key Laboratory of Nuclear Technology Application and Radiation Protection in Astronautics, Ministry of Industry and Information Technology, Nanjing, 211106, China

    Xiaobin Tang

  3. Suzhou Nuclear Power Research Institute, Suzhou, 215004, China

    Minyu Fan & Ping Huang

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  1. Songyuan Li
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Correspondence to Feida Chen.

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Li, S., Chen, F., Tang, X. et al. Effect of Ti on the Microstructure and Mechanical Properties of AlCrFeNiTix Eutectic High-Entropy Alloys. J. of Materi Eng and Perform 31, 8294–8303 (2022). https://doi.org/10.1007/s11665-022-06825-1

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