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Effects of Tungsten Addition on the Microstructure and Mechanical Properties of Near-Eutectic AlCoCrFeNi2 High-Entropy Alloy

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Abstract

The effects of tungsten addition on the microstructure and mechanical properties of near-eutectic AlCoCrFeNi2 high-entropy alloy were investigated in this paper. The AlCoCrFeNi2W x alloys comprised the primary BCC phase plus eutectic FCC/BCC phases. It was found that W element can both promote the formation of the primary BCC phase and act as a solid solution strengthening element. The hardness of the AlCoCrFeNi2W x alloys increased from HV 293 to HV 356.2 with the increase in W content. The addition of W element improved the strength of alloys but reduced ductility. Thereinto, the AlCoCrFeNi2W0.2 alloy showed the most excellent compressive properties with the fracture strength of 2785.9 MPa and the plastic strain of 0.42, respectively, which implied the potential industrial application values.

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Acknowledgments

This research was supported by the National Natural Science Foundation of China (Grant No. 51671044) and “one-hundred young talents” projects of Guangdong University of Technology (No. 220413575).

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Authors and Affiliations

  1. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China

    Yong Dong

  2. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Yong Dong & Yiping Lu

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  1. Yong Dong
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  2. Yiping Lu
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Correspondence to Yong Dong or Yiping Lu.

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Dong, Y., Lu, Y. Effects of Tungsten Addition on the Microstructure and Mechanical Properties of Near-Eutectic AlCoCrFeNi2 High-Entropy Alloy. J. of Materi Eng and Perform 27, 109–115 (2018). https://doi.org/10.1007/s11665-017-3096-6

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  • DOI: https://doi.org/10.1007/s11665-017-3096-6

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