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Study on Microstructure and Wear and Corrosion Resistance of CoCrMnNiMox High Entropy Alloy Coatings

  • ZHANG Xin ,
  • JIANG Shu-ying ,
  • YANG Hao-yan ,
  • ZHANG Heng-wei ,
  • HU Wei-wei
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  • College of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, China

Received date: 2022-12-01

  Revised date: 2023-01-12

  Accepted date: 2023-02-13

  Online published: 2023-07-14

Abstract

In order to increase the wear and corrosion resistance of the surface of the steel structures, four kinds of CoCrMnNiMox (x=0.1, 0.2, 0.3, 0.4) high entropy alloy (HEA) coatings with different compositions were prepared on N80 steel substrate by laser cladding. The effect of Mo content on microstructure, wear resistance and corrosion resistance of HEA coating was studied. Results showed that the CoCrMnNiMox coating structure was a single FCC phase. With the increase of Mo content, the coating hardness increased. The average Vickers hardness of the CoCrMnNiMo0.4 HEA coating was up to 628 HV, which was 3.8 times higher than that of N80 steel substrate (165 HV). The friction coefficient decreased first and then increased, reaching the lowest (0.38) at Mo content of 0.3, which reduced by 0.40 compared to that of N80 substrate. The wear mechanism of clad layer changed from adhesive wear to abrasive wear and the wear resistance increased. The dynamic corrosion and static corrosion of clad layer reached the optimum at Mo content of 0.3. Compared with the substrate, the dynamic corrosion potential increased by 0.2 V at Mo content of 0.3, and the corrosion current density decreased by one order of magnitude. However, the corrosion resistance of the clad layer was greatly reduced compared with the static corrosion due to the promoting effect of wear on corrosion. The corrosion wear coupling test results showed that with the increase of Mo content, the potential first gradually increased and then decreased. The potential reached the highest (-0.28 V) at Mo content of 0.3. The corrosion resistance under friction condition was the best, which was 0.22 V higher than that of N80 substrate (-0.50 V). The wear and corrosion resistance of the substrate surface were well improved. The friction coefficient of the sample under corrosion increased first and then decreased. Except for the high friction coefficient at Mo content of 0.2, the friction coefficient of the other samples was low in the stable run-in stage, and the wear resistance under corrosion condition was relatively good.

Cite this article

ZHANG Xin , JIANG Shu-ying , YANG Hao-yan , ZHANG Heng-wei , HU Wei-wei . Study on Microstructure and Wear and Corrosion Resistance of CoCrMnNiMox High Entropy Alloy Coatings[J]. Materials Protection, 2023 , 56(6) : 106 -114 . DOI: 10.16577/j.issn.1001-1560.2023.0141

References

[1] 杜琮昊, 白秀琴. 海洋环境下典型金属材料腐蚀与磨损研究进展[J]. 润滑与密封, 2021, 46(2): 121-133.
DU C H, BAI X Q. Research progress on corrosion and wear of typical metal materials under marine environment[J]. Lubrication and Sealing, 2021, 46(2): 121-133.
[2] 胡 记. TC21钛合金表面激光熔覆Ti0.8CoCrFeNi系高熵合金复合涂层的研究[D]. 大连:大连理工大学, 2021.
HU J. Study on Laser Cladding of Ti0.8CoCrFeNi-based High-Entropy Alloy Composite Coating on TC21 Titanium Alloy[D].Dalian: Dalian University of Technology, 2021.
[3] 刘书法, 李同跃, 付春雷, 等. 海洋钢结构腐蚀原因及防腐蚀方法分析[J]. 石油和化工设备, 2021, 24(5): 91-94.
LIU S F, LI T Y, FU C L, et al. Analysis of corrosion causes and anti-corrosion methods of Marine steel structures[J]. Petroleum and Chemical Equipment, 2021, 24(5): 91-94.
[4] 蒋淑英, 许红明, 蔡 畅, 等. 激光熔覆-离子渗氮复合改性层的组织和耐磨耐蚀性研究[J]. 中国石油大学学报(自然科学版), 2022, 46(1): 163-170.
JIANG S Y, XU H M, CAI C, et al. Study on microstructures, wear resistance and corrosion resistance of the laser cladding-ion nitriding composite modified layer[J]. Journal of China University of Petroleum (Edition of Natural Scince), 2022, 46(1): 163-170.
[5] 董天顺, 刘 琦, 李艳姣, 等. 高熵合金涂层的研究现状及展望[J]. 材料保护, 2020, 53(7):137-141.
DONG T S, LIU Q, LI Y J, et al. Petroleum and chemical equipment[J]. Materials Protection, 2020, 53(7): 137-141.
[6] YEH J W, CHEN S K, LIN S J, et al. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes[J]. Advanced Engineering Materials, 2004, 6(5): 299-303.
[7] SENKOV O N, WILKS G B, SCOTT J M, et al. Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys[J]. Intermetallics, 2011, 19(5): 698-706.
[8] LIU H, LIU J, CHEN P, et al. Microstructure and high temperature wear behaviour of in-situ TiC reinforced AlCoCrFeNi-based high-entropy alloy composite coatings fabricated by laser cladding[J]. Optics & Laser Technology, 2019, 118: 140-150.
[9] XIE D Q, ZHAO J F, QI Y G, et al. Decreasing pores in a laser cladding layer with pulsed current[J]. Chinese Optics Letters, 2013, 11(11): 111401.
[10] ZHANG M, ZHOU X, YU X, et al. Synthesis and characterization of refractory TiZrNbWMo high-entropy alloy coating by laser cladding[J]. Surface and Coatings Technology, 2017, 311: 321-329.
[11] GUO N N, WANG L, LUO L S, et al. Hot deformation characteristics and dynamic recrystallization of the MoNbHfZrTi refractory high-entropy alloy[J]. Materials Science and Engineering: A, 2016, 651: 698-707.
[12] STEPANOV N D, SHAYSULTANOV D G, SALISHCHEV G A, et al. Structure and mechanical properties of a light-weight AlNbTiV high entropy alloy[J]. Materials Letters, 2015, 142: 153-155.
[13] YOUSSEF K M, ZADDACH A J, NIU C, et al. A Novel Low-Density, High-Hardness, High-entropy Alloy with Close-packed Single-phase Nanocrystalline Structures[J]. Materials Research Letters, 2014, 3(2): 95-99.
[14] 苏允海, 邓 越, 窦丽杰, 等. Mo元素含量对FeAlCuCrNiMox系高熵合金组织结构及性能的影响[J]. 焊接学报, 2019, 40(9): 111-115.
SU Y H, DENG Y, DOU L J, et al. Effect of Mo content on microstructure and properties of FeAlCuCrNiMox high entropy alloys[J]. Transactions of the Welding Institution, 2019, 40(9): 111-115.
[15] FU Y, HUANG C, DU C, et al. Evolution in microstructure, wear, corrosion, and tribocorrosion behavior of Mo-containing high-entropy alloy coatings fabricated by laser cladding[J]. Corrosion Science, 2021, 191: 109727.
[16] 汪 震, 尚晓娟, 田兴强, 等.激光熔覆工艺参数对MoFeCrTiWAlNb高熔点高熵合金涂层组织和性能的影响[J]. 材料保护, 2021, 54(4):94-101.
WANG Z, SHANG X J, TIAN X Q, et al. Effect of laser cladding parameters on microstructure and properties of MoFeCrTiWAlNb high melting point and high entropy alloy coatings[J]. Materials Protection, 2021, 54(4):94-101.
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