Effect of Heat Treatment on Phase Composition, Microstructure and Mechanical Properties of HVOF-sprayed Al0.6TiCrFeCoNi High Entropy Alloy Coatings

Monday, May 27, 2019: 15:35
Exhibit Hall C (Pacifico Yokohama)
Mr. Lijia Chen , Beijing University of Technology, Beijing, China
Dr. Zheng Zhou , Beijing University of Technology, Beijing, China
Prof. Dingyong He , Beijing University of Technology, Beijing, China
In this study, an Al0.6TiCrFeCoNi high entropy alloy coating was produced by high-velocity-oxygen-fuel spraying. Moreover, the coatings were heat-treated at T=500℃ and T=650℃ for 2h and 100h to investigate the effect of heat treatment on microstructure, phase composition and mechanical properties of the coating. The results show that the coating in as-sprayed condition was very dense, consisting of two BCC phases with similar lattice parameters. The heat treatment at T=650°C for 100h facilitated the phase transition and the precipitation of σ-FeCr phase, which resulted in the change of the mechanical properties of the coating. After heat treatment at T=500°C, there was no phase transformation observed, but the mechanical properties changed.
See more of: Oerlikon Metco Young Professionals Session
See more of: Young Professionals Session