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DI Yingnan,LIU Hongxi*,CHEN Lin,ZHANG Xiaowei,LIU Jingzhou,LIN Jianquan
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Affiliation:

1.Kunming University of Science and Technology;2.LIN Jianquan

Clc Number:

TG174.4

Fund Project:

Microstructure evolution characteristics and solidification kinetics mechanism of laser cladding fabrication 3D functional coating under the synergistic action of magnetic field and mechanical vibration

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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.

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[DI Yingnan, Liu Hongxi, ZHANG Xiaowei, CHEN Lin, LIU Jingzhou, LIU Jingzhou, HAO Xuanhong, 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.]
DOI:10.12442/j. issn.1002-185X.20200654

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History
  • Received:September 01,2020
  • Revised:December 15,2020
  • Adopted:December 22,2020
  • Online: September 07,2021
  • Published: August 31,2021