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Microstructure and properties of Al0.3CrFe1.5MnNi0.5Ti x and Al0.3CrFe1.5MnNi0.5Si x high-entropy alloys

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Abstract

In this article, the microstructure, hardness, and corrosion resistance of the Al0.3CrFe1.5MnNi0.5Ti x and Al0.3CrFe1.5MnNi0.5Si x (x = 0, 0.2, 0.5, 1.0) high-entropy alloys were investigated via X-ray diffraction (XRD), scanning electron microscopy (SEM), digital display Vickers hardness tester, and electrochemical technique. These alloys are mainly composed of BCC solid-solution structure. When adding high content of Ti or Si element (x ≥ 0.5), some intermetallic compounds are found in the microstructure, which makes the alloys have a high hardness, high brittleness, and easy cracking. While the alloys with low content of Ti or Si (x = 0.2) have a hardness of HV 420–HV 430, and its hardness increases about 14 % compared with that of Al0.3CrFe1.5MnNi0.5. Electrochemical results in 3.5 % NaCl solution show that the alloying elements Ti and Si have a negative influence on the corrosion resistance of the Al0.3CrFe1.5MnNi0.5 alloys.

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Acknowledgments

This work was financially supported by the Post-doctoral Scientific Research Foundation of Zhengzhou University and Post-doctoral Scientific Research Foundation of China (No. 2013M541986).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China

    Bo Ren, Zhong-Xia Liu & Shao-Kang Guan

  2. School of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou, 450007, China

    Bo Ren, Rui-Feng Zhao & Hong-Song Zhang

Authors
  1. Bo Ren
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  2. Rui-Feng Zhao
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  3. Zhong-Xia Liu
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  4. Shao-Kang Guan
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Correspondence to Bo Ren.

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Ren, B., Zhao, RF., Liu, ZX. et al. Microstructure and properties of Al0.3CrFe1.5MnNi0.5Ti x and Al0.3CrFe1.5MnNi0.5Si x high-entropy alloys. Rare Met. 33, 149–154 (2014). https://doi.org/10.1007/s12598-014-0224-4

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  • DOI: https://doi.org/10.1007/s12598-014-0224-4

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