Chinese Journal of Lasers, Volume. 45, Issue 7, 0702008(2018)
Microstructure and Performance of NiTi-Based Intermetallic Compound Coatings by Laser Melting Deposition
The NiTi-based intermetallic compound coating is in-situ synthesized on the surface of Ti-6Al-4V (TC4) substrate by the laser melting deposition (LMP) technique. The microstructure characteristics, microhardness and electrochemical corrosion resistance of this coating are investigated. The research results show that, this coating is mainly composed of the intermetallic compounds as NiTi, Ni3Ti, NiTi2, Ni4Ti3 and so on. The microhardness of this coating is up to 800 HV, which is about 1.3 times higher than that of the TC4 substrate. Inhomogeneous passive films are formed on the surface of the coating and there also exist many pittings, and thus there is a slight decrease in corrosion resistance of this coating compared with that of the TC4 substrate.
Get Citation
Copy Citation Text
Xiaoqin Dai, Quanju Shi, Yu Zhao, Yongbo Xu, Jianbo Lei, Shengfeng Zhou. Microstructure and Performance of NiTi-Based Intermetallic Compound Coatings by Laser Melting Deposition[J]. Chinese Journal of Lasers, 2018, 45(7): 0702008
Category: laser manufacturing
Received: Jan. 4, 2018
Accepted: --
Published Online: Sep. 11, 2018
The Author Email: