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Title: Mechanical and Corrosion Behavior of Zr-Doped High-Entropy Alloy from CoCrFeMoNi System
Authors: Brito García, Santiago 
Mirza-Rosca, Julia 
Geanta, Victoras 
Voiculescu, Ionelia 
UNESCO Clasification: 3313 Tecnología e ingeniería mecánicas
Keywords: CoCrFeMoNiZr
Microstructure, et al
Issue Date: 2023
Project: Microscopio Electronico Multifuncional 
Journal: Materials 
Abstract: The aim of the paper is to study the Zr addition effect on the mechanical properties and corrosion behavior of a high-entropy alloy from the CoCrFeMoNi system. This alloy was designed to be used for components in the geothermal industry that are exposed to high temperature and corrosion. Two alloys, one Zr-free (named Sample 1) and another one doped with 0.71 wt.% Zr (named Sample 2), were obtained in a vacuum arc remelting equipment from high-purity granular raw materials. Microstructural characterization and quantitative analysis by SEM and EDS were performed. The Young modulus values for the experimental alloys were calculated on the basis of a three-point bending test. Corrosion behavior was estimated by linear polarization test and by electrochemical impedance spectroscopy. The addition of Zr resulted in a decrease in the value of the Young modulus but also in a decrease in corrosion resistance. The beneficial effect of Zr on the microstructure was the grain refinement, and this ensured a good deoxidation of the alloy.
ISSN: 1996-1944
DOI: 10.3390/ma16051832
Source: Materials [EISSN 1996-1944], v. 16 (5), 1832, (Marzo 2023)
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