黄光灿,郭纯,李云,陈林婷,李文清,陈艳艳,张新宇,林清成.添加Y2O3对激光熔覆制备FeCoNiCuAl高熵合金涂层组织性能的影响[J].表面技术,2024,53(15):163-172.
HUANG Guangcan,GUO Chun,LI Yun,CHEN Linting,LI Wenqing,CHEN Yanyan,ZHANG Xinyu,LIN Qingcheng.Effect of Y2O3 Addition on Microstructure Properties of FeCoNiCuAl High-entropy Alloy Coatings Prepared by Laser Cladding[J].Surface Technology,2024,53(15):163-172 |
| 添加Y2O3对激光熔覆制备FeCoNiCuAl高熵合金涂层组织性能的影响 |
| Effect of Y2O3 Addition on Microstructure Properties of FeCoNiCuAl High-entropy Alloy Coatings Prepared by Laser Cladding |
| 投稿时间：2023-06-15 修订日期：2024-01-15 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.15.015 |
| 中文关键词: 激光熔覆 高熵合金 Y2O3 力学性能 显微组织 耐腐蚀性 |
| 英文关键词:laser cladding high-entropy alloys Y2O3 mechanical performance microstructures corrosion resistance |
| 基金项目:安徽省高校自然科学研究项目重大项目(2023AH040273);安徽省高校优秀拔尖人才培育项目(gxbjZD2022046);安徽省高校协同创新项目(GXXT-2023-025，GXXT-2023-026);安徽省高校自然科学研究项目(YJS20210558，KJ2020A0073);安徽科技学院学术和技术带头人后备人选项目(202101) |
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| Author | Institution |
| HUANG Guangcan | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| GUO Chun | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| LI Yun | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| CHEN Linting | Anhui Yuchen Laser Technology Co., Ltd., Anhui Bengbu 233000, China |
| LI Wenqing | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| CHEN Yanyan | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| ZHANG Xinyu | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
| LIN Qingcheng | College of Mechanical Engineering, Anhui Science and Technology University, Anhui Fengyang 233100, China |
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| 中文摘要: |
| 目的 研究不同质量分数Y2O3对激光熔覆制备FeCoNiCuAl高熵合金涂层的影响。方法 利用IPG-4000W激光器和KUKA机器人组成的激光熔覆设备在45钢基材表面制备FeCoNiCuAl-xY2O3(x=0%、5%、10%、15%、20%)高熵合金复合涂层，分别使用金相显微镜、X射线衍射仪(XRD)、维氏硬度计、摩擦磨损试验机、扫描电镜(SEM)以及电化学工作站，分析涂层的显微组织及物相构成，测量涂层的显微硬度，分析涂层的摩擦磨损行为和腐蚀行为。结果 Y2O3的加入并未明显改变涂层物相构成，添加Y2O3与FeCoNiCuAl高熵合金复合涂层物相主要由γ-Fe固溶体、Cu2O、AlNi、Al5CO2、Fe2O3组成。FeCoNiCuAl高熵合金复合涂层的显微组织由等轴晶与枝状晶构成，Y2O3的加入促进了熔池流动，使孔隙逐渐消失，因此在加入Y2O3后，晶粒细化变得更加致密，明显改善了组织的内部缺陷，从而有效提升了涂层的性能。结论 当x=5时涂层显微组织为致密的枝状晶，对应的平均显微硬度为675.1HV0.2，涂层磨损率为1.12×10−7 g/(N.m)，表现出最优的耐磨损性能，腐蚀电位为-0.628 V，同时表现出最优的耐腐蚀性能;相较于未添加Y2O3的涂层以及基材本身，力学性能与耐腐蚀性能得到了明显提升。 |
| 英文摘要: |
| The work aims to investigate the effect of different mass fractions of Y2O3 on the preparation of FeCoNiCuAl high-entropy alloy coatings by laser melting. The high entropy alloy coating of FeCoNiCuAl-xY2O3 (x=0%, 5%, 10%, 15%, 20%) was prepared on the surface of 45 steel substrate with a laser melting equipment consisting of IPG-4000 W laser and KUKA robot. The Y2O3 and FeCoNiCuAl powders were weighed and mixed uniformly with an electronic balance according to the experimental protocol, and the test specimens were prepared by pre-set powder feeding. The test specimens were cut into pieces with an EDM wire cutter, and the test specimens were polished with fine to coarse sandpaper to remove surface impurities and oxidation layer, and cleaned with anhydrous ethanol after polishing. The metallographic specimens were corroded with aqua regia and the microstructure of the coating was observed with a 4 XC microscope. The results showed that the microstructure of the FeCoNiCuAl high-entropy alloy coating consisted of equiaxed crystals and dendrites, and the microstructure of the coating with the addition of 5% Y2O3 by mass was dense dendrites; the composition of the coating phases was analyzed and investigated with a Pulitzer XD-3 X-ray diffractometer. The results showed that the addition of Y2O3 did not significantly change the composition of the coating phases, and the composite coating phases of Y2O3 and FeCoNiCuAl high-entropy alloy mainly consisted of γ-Fe solid solution, Cu2O, AlNi, Al5CO2, and Fe2O3; The microhardness of the coating was measured by HV1000 Z Vickers hardness tester. The results showed that the microhardness of the coating with Y2O3 was higher than that of the coating without the reinforced phase and the coating with the reinforced phase. The average microhardness of the coating with the addition of Y2O3 was 675.1HV0.2, which was the highest due to the fine grain reinforcement brought by the addition of Y2O3, which improved the mechanical properties of the coating. The results showed that the wear rate of the coating with Y2O3 was 1.12×10−7 g/(N.m), which exhibited the best wear resistance; The wear morphology of the coating was observed with a ZEISS-EVO18 scanning electron microscope. The results showed that the wear mechanism of the coating without Y2O3 was abrasive wear. After the addition of Y2O3, the wear mechanism changed to adhesive wear; The coating was coated with Y2O3 using a CHI 660E electrochemical workstation. A three-electrode system was used to carry out Tafel curve and electrochemical impedance spectroscopy (EIS) test. The results showed that the coating impedance of 5% Y2O3 added by mass fraction was the largest. The larger the radius of curvature of the capacitive arc, the greater the charge transfer impedance; At the same time, the electrode potential was the most positive. The more negative electrode potential, the less corrosion resistance; The more positive electrode potential, the more corrosion resistance. It is concluded that the corrosion resistance of Y2O3 coating with 5wt.% is optimal. The addition of Y2O3 promotes the melt pool flow and makes the pores disappear gradually. So after adding Y2O3, the grain refinement becomes more dense, which obviously improves the internal defects of the organization, thus effectively enhancing the performance of the coating. Compared with the coating without the reinforced phase and the 45 steel substrate, the performance of the coating with the addition of Y2O3 is significantly improved. |
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