x (x=0, 0.5, 1.0, 1.5, 2.0) high entropy alloy (HEA) coatings were prepared by laser cladding method. The effect of Mo content on the microstructure, hardness, and corrosion resistance of the coatings was studied. Results show that with increasing the Mo content, the microstructure is changed from (Al, Ni)-rich body-centered cubic (bcc) phase+(Mo-Cr-Fe)-rich σ phase into (Fe, Ni)-rich bcc phase+(Mo-Cr-Fe)-rich σ phase+(Al-Fe-Mo)-rich σ phase+a little AlN (aluminum nitride). Additionally, the coating hardness (HV1) is increased from 6514.4 MPa to 10652.6 MPa. With increasing the Mo addition, the self-corrosion potential of the coating in 3.5wt% NaCl solution is also increased. The coating presents the optimal corrosion resistance at x=1.0."/>

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Effect of Mo on Microstructure and Properties of AlCoCrFeNiMo x High Entropy Alloy Coatings Prepared by Laser Cladding
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1.School of Materials and Metallurgy, University of Science and Technology LiaoNing, Anshan 114051, China;2.State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, China;3.Steel Research Institute, Angang Group, Anshan 114009, China

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National Natural Science Foundation of China (51774179); Natural Science Foundation of Liaoning Province (20180550546); Joint Fund of State Key Laboratory of Metal Material for Marine Equipment and Application (HGSKL-USTLN(2021)03)

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    Abstract:

    AlCoCrFeNiMox (x=0, 0.5, 1.0, 1.5, 2.0) high entropy alloy (HEA) coatings were prepared by laser cladding method. The effect of Mo content on the microstructure, hardness, and corrosion resistance of the coatings was studied. Results show that with increasing the Mo content, the microstructure is changed from (Al, Ni)-rich body-centered cubic (bcc) phase+(Mo-Cr-Fe)-rich σ phase into (Fe, Ni)-rich bcc phase+(Mo-Cr-Fe)-rich σ phase+(Al-Fe-Mo)-rich σ phase+a little AlN (aluminum nitride). Additionally, the coating hardness (HV1) is increased from 6514.4 MPa to 10652.6 MPa. With increasing the Mo addition, the self-corrosion potential of the coating in 3.5wt% NaCl solution is also increased. The coating presents the optimal corrosion resistance at x=1.0.

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[Sha Minghong, Wang Shuang, Li Shengli, Jia Chuntang, Huang Tiandang, Zhu Xiaolei, Ai Xingang, Liao Xiangwei. Effect of Mo on Microstructure and Properties of AlCoCrFeNiMo x High Entropy Alloy Coatings Prepared by Laser Cladding[J]. Rare Metal Materials and Engineering,2023,52(11):3685~3690.]
DOI：10.12442/j. issn.1002-185X. E20230007

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History
  • Received:March 24,2023
  • Revised:July 03,2023
  • Adopted:July 06,2023
  • Online: November 23,2023
  • Published: November 22,2023