Effect of yttrium doping on microstructure and mechanical properties of CoCrFeNi high entropy alloy prepared by molten salt electrolysis

HU Mengjun; YANG Hao; LUO Xiangyu; WEN Liangying; HU Meilong

doi:10.7513/j.issn.1004-7638.2025.03.024

Volume 46 Issue 3

Jun. 2025

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HU Mengjun, YANG Hao, LUO Xiangyu, WEN Liangying, HU Meilong. Effect of yttrium doping on microstructure and mechanical properties of CoCrFeNi high entropy alloy prepared by molten salt electrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(3): 174-179. doi: 10.7513/j.issn.1004-7638.2025.03.024

Citation:

HU Mengjun, YANG Hao, LUO Xiangyu, WEN Liangying, HU Meilong. Effect of yttrium doping on microstructure and mechanical properties of CoCrFeNi high entropy alloy prepared by molten salt electrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(3): 174-179. doi: 10.7513/j.issn.1004-7638.2025.03.024

Citation:

HU Mengjun, YANG Hao, LUO Xiangyu, WEN Liangying, HU Meilong. Effect of yttrium doping on microstructure and mechanical properties of CoCrFeNi high entropy alloy prepared by molten salt electrolysis[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(3): 174-179. doi: 10.7513/j.issn.1004-7638.2025.03.024

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Effect of yttrium doping on microstructure and mechanical properties of CoCrFeNi high entropy alloy prepared by molten salt electrolysis

doi: 10.7513/j.issn.1004-7638.2025.03.024

1.
School of Mechanical Engineering and Automation, Chongqing Industry Polytechnic College, Chongqing 401120, China
2.
School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

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Received Date: 2024-04-08
Available Online: 2025-06-30
Publish Date: 2025-06-30

Abstract

Abstract

High-entropy alloys of CoCrFeNi had been prepared by electrolysis process using the mixed oxides as the raw materials, and the effects of rare earth element of Yttrium doping on the phase, microstructure and mechanical properties of CoCrFeNi high-entropy alloys were also studied. The results show that CoCrFeNi high-entropy alloy can be directly prepared by electrolysis from the mixed oxides of CoO, Cr₂O₃, NiO, Fe₂O₃, and Y doping can be directly mixed with the main oxide in the form of Y₂O₃ and deoxidized to achieve Y doping. The second phase of Cr₇C₃ appears in CoCrFeNi high-entropy alloy when using electrolysis process. The appropriate amount of Y can effectively improve the mechanical properties of CoCrFeNi high-entropy alloy. When the addition amount of Y reaches 5%, the hardness of the high-entropy alloy is 399 HV, which is 58.3% higher than that of the CoCrFeNi high-entropy alloy without Y addition. When the addition of Y is 1%, the tensile strength of CoCrFeNi high-entropy alloy increases by 10.7 % and the elongation increases by 5 times.
- CoCrFeNi,
- high entropy alloys,
- Y,
- electrochemical process,
- hot press sintering

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References(20)

References

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