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<p>In the study, NiCoFeCuCr<sub>x</sub> (x = 0.6, 1.0, 1.4) high-entropy alloys (HEAs) had been successfully prepared using the high-energy ball milling and spark plasma sintering (SPS) technology. The microstructure, mechanical properties, and electrochemical properties of the NiCoFeCuCr<sub>x</sub> HEAs had been examined through scanning electron microscope, universal mechanical testing machine, and an electrochemical workstation. The mechanical properties revealed that the hardness of NiCoFeCuCr<sub>x</sub> had increased from 1046.5 HV at x = 0.6 to 1746.1 HV at x = 1.4, marking a significant rise in hardness of approximately 66.9%. At a compression rate of 0.5&#xa0;mm/min, the compressive fracture strength had also experienced a slight increase, from 1354.1 to 1484.1&#xa0;MPa. The findings from the electrochemical corrosion tests indicated that the Ecorr and icorr of the NiCoFeCuCr<sub>0.6</sub> alloy were − 0.262&#xa0;V and 6.46 × 10<sup>-5</sup>&#xa0;A&#xa0;cm<sup>-2</sup>, respectively. In contrast, the Ecorr and icorr of the NiCoFeCuCr<sub>1.4</sub> alloy were − 0.071&#xa0;V and 2.95 × 10<sup>-5</sup>&#xa0;A&#xa0;cm<sup>-2</sup>. The NiCoFeCuCr<sub>1.4</sub> alloy had a higher corrosion potential (Ecorr) and a smaller corrosion current density (icorr).</p>

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Mechanical and Electrochemical Corrosion Properties of Mechanical Alloyed NiCoFeCuCrx High-Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Wang Xin,
  • Yu Zhaoxu,
  • Liu Cong,
  • Kong Tiantian,
  • Bian Zhiruo,
  • Li Qingning

摘要

In the study, NiCoFeCuCrx (x = 0.6, 1.0, 1.4) high-entropy alloys (HEAs) had been successfully prepared using the high-energy ball milling and spark plasma sintering (SPS) technology. The microstructure, mechanical properties, and electrochemical properties of the NiCoFeCuCrx HEAs had been examined through scanning electron microscope, universal mechanical testing machine, and an electrochemical workstation. The mechanical properties revealed that the hardness of NiCoFeCuCrx had increased from 1046.5 HV at x = 0.6 to 1746.1 HV at x = 1.4, marking a significant rise in hardness of approximately 66.9%. At a compression rate of 0.5 mm/min, the compressive fracture strength had also experienced a slight increase, from 1354.1 to 1484.1 MPa. The findings from the electrochemical corrosion tests indicated that the Ecorr and icorr of the NiCoFeCuCr0.6 alloy were − 0.262 V and 6.46 × 10-5 A cm-2, respectively. In contrast, the Ecorr and icorr of the NiCoFeCuCr1.4 alloy were − 0.071 V and 2.95 × 10-5 A cm-2. The NiCoFeCuCr1.4 alloy had a higher corrosion potential (Ecorr) and a smaller corrosion current density (icorr).