Abstract
This study aimed to design and prepare the following four kinds of refractory high-entropy alloys (RHEAs): TiZrHf, TiZrHfSc, TiZrHfY, and TiZrHfScY. All the four RHEAs showed a hexagonal close-packed (HCP)-based structure. Both the strength and ductility increased in the TiZrHfSc alloy compared with the TiZrHf alloy because of the addition of Sc element and the formation of a fine needle-like lamellar structure in the former. The mechanical properties of TiZrHfY and TiZrHfScY alloys decreased after the addition of Y element because of the segregation. The conductivity of TiZrHf, TiZrHfSc, TiZrHfY, and TiZrHfScY alloys decreased compared with that of pure Ti, Zr, Hf, Sc, and Y elements. However, their resistivity was comparable to the traditional electrical resistivity of the alloys at room temperature because of the serious lattice distortion in the HEAs. All the four alloys showed a typical paramagnetic behavior. These characteristics make the alloys suitable for industrial applications.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 51671044, 51822402 and 51574058), Dalian Support Plan for Innovation of High-level Talents (Top and Leading Talents, 2015R013), the Fundamental Research Funds for the Central Universities (DUT16ZD206), Dalian Support Plan for Innovation of High-level Talents (Youth Technology Stars, 2016RQ005).
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Huang, T., Jiang, H., Lu, Y. et al. Effect of Sc and Y addition on the microstructure and properties of HCP-structured high-entropy alloys. Appl. Phys. A 125, 180 (2019). https://doi.org/10.1007/s00339-019-2484-1
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DOI: https://doi.org/10.1007/s00339-019-2484-1