Sintering and heat treatment of Al15Ti5Co35Ni25Fe20 high-entropy alloy

4th International Conference Recent Trends in Structural Materials

Górecki, K.^1 ; Zýka, J.^2 ; Malek, J.^2,3 ; Horvát, J.^3 ; apek, J.^4 ; Bala, P.^1,5

AGH University of Science and Technology, Faculty of Metals Engineering, Industrial Computer Science, Department of Physical and Powder Metallurgy, EU, Krakow, Poland^1

UJP PRAHA A.s., 15610 Prague 5, Zbraslav, EU, Czech Republic^2

Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering, Prague 2, EU

12000, Czech Republic^3

Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, EU, Prague

2 12000, Czech Republic^4

AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, EU, Krakow, Poland^5

关键词: Annealing time;    Chemical homogeneity;    Elemental powders;    FCC phase;    High entropy alloys;    Optimal conditions;    Valence electron concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/179/1/012027/pdf
DOI  :  10.1088/1757-899X/179/1/012027

来源: IOP

【 摘 要 】

The new Al15Ti5Co35Ni25Fe20high entropy alloy was obtained by the powder metallurgy from the elemental powders (-325 mesh). The obtained alloy should be characterized by the dual BCC + FCC phase microstructure according to the valence electron concentration calculations (VEC=7.9). The main aim of the research was to determine the optimal conditions for sintering and heat treatment of Al15Ti5Co35Ni25Fe20high entropy alloy. The alloy was sintered for 40 minutes at 600 C for the preliminary consolidation of the powders and initial diffusion of the material. Then samples were annealed at various temperatures: 700, 800, 900, 1000 C for 1 hour. Samples after annealing were characterized by the XRD and SEM. For the chosen temperature the annealing time was elongated to 2, 3, 5, 10 and 20 hours. The chemical homogeneity was determined.