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邸英南,刘洪喜,张晓伟,陈林,刘径舟,蔺健全,郝轩宏,王悦怡.钛合金表面激光熔覆AlCoCrFeMoVTi高熵合金涂层的摩擦磨损和高温抗氧化性能[J].稀有金属材料与工程(英文),2021,50(8):2883~2891.[DI Yingnan,Liu Hongxi,ZHANG Xiaowei,CHEN Lin,LIU Jingzhou,LIU Jingzhou,HAO Xuanhong and WANG Yueyi.DI Yingnan,LIU Hongxi*,CHEN Lin,ZHANG Xiaowei,LIU Jingzhou,LIN Jianquan[J].Rare Metal Materials and Engineering,2021,50(8):2883~2891.]
DI Yingnan,LIU Hongxi*,CHEN Lin,ZHANG Xiaowei,LIU Jingzhou,LIN Jianquan
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Received:September 01, 2020  
DOI:
Key words: High-entropy alloy (HEA) coating  Laser cladding  Titanium alloy  Friction and wear behavior  High-temperature oxidation resistance
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
DI Yingnan,Liu Hongxi,ZHANG Xiaowei,CHEN Lin,LIU Jingzhou,LIU Jingzhou,HAO Xuanhong and WANG Yueyi  
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Abstract:
      In order to improve the friction and wear behavior and high-temperature oxidation resistance of titanium alloy, AlCoCrFeMoVTi high-entropy alloy (HEA) were designed and AlCoCrFeMoVTi HEA coatings were prepared by laser cladding technique on Ti6AI4V titanium alloy (TC4) surface. The phase composition and microstructure of AlCoCrFeMoVTi HEA coating were analyzed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The microhardness of coatings was measured by HDX-1000 Vickers hardness tester. The wear resistance and high-temperature oxidation resistance of the coating were tested by UMT-3 friction tester and GSL-1400X tubular resistance furnace. The results show that the AlCoCrFeMoVTi HEA coating is mainly composed of face centered cubic (FCC) structures and body centered cubic (BCC) structures binary eutectic phase. The maximum microhardness of the coating was 1099 HV0.2, which was 3.29 times that of TC4 titanium alloy substrate. The friction coefficient of the coating was 0.31, and the wear volume was 1.79×10-4 mm3, respectively 59.62% and 12.01% of the matrix. After oxidation at 800℃ for 50 h, the oxidation weight of the coating was 1.49 mg, which was only 16.37% of the matrix. Laser cladding AlCoCrFeMoVTi HEA coating can significantly improve the friction and wear behavior and high-temperature oxidation resistance of Ti6Al4V titanium alloy.