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Rare Metals

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In situ TiN-reinforced CoCr2FeNiTi0.5 high-entropy alloy composite coating fabricated by laser cladding

  • Ya-Xiong Guo
  • Qi-Bin LiuEmail author
  • Xiao-Juan Shang
Article
  • 34 Downloads

Abstract

The fcc structural CoCr2FeNiTi0.5 high-entropy alloy (HEA) composite coating with TiN particles reinforced was acquired by laser cladding on the commercial 904L stainless steels. The results show that phase structure is mainly composed of fcc solid solution and TiN phases. The coating exhibits excellent structural stability below 850 °C. The microstructure consists of irregular dendrite and TiN particles. Transmission electron microscopy (TEM) results reveal that the close-packed plane of fcc phase is (111) with interplanar spacing of ~ 0.208 nm. The interface between TiN and fcc matrix is semi-coherent. And the angle of boundary between dendrite and matrix is ~ 65°. The hardness and corrosion resistance of coating have much improvement compared with those of substrate.

Keywords

TiN particle reinforced High-entropy alloy Semi-coherent interface Laser cladding 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51671061), the High-Level Innovative Talents Plan of Guizhou Province (No. (2015)4009) and the Industrial Research Project of Guizhou Provincial Science and Technology Department (No. (2015)3022).

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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Materials and MetallurgyGuizhou UniversityGuiyangChina
  2. 2.Guizhou Province Key Laboratory of Materials Structure and StrengthGuiyangChina

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