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Title: Impact of Ti Doping on the Microstructure and Mechanical Properties of CoCrFeMoNi High-Entropy Alloy
Authors: Brito García, Santiago José 
Mirza Rosca, Julia Claudia 
Jiménez Marcos, Cristina 
Voiculescu, Ionelia 
UNESCO Clasification: 331209 Resistencia de materiales
Keywords: High Entropy Alloys
Three-Point Bending
Issue Date: 2023
Project: Microscopio Electronico Multifuncional 
Journal: Metals 
Abstract: The design principle of high-entropy alloys is to mix many chemical elements in equal or nearly equal proportions to create new alloys with unique and special properties such as high strength, ductility and corrosion resistance. Some properties of high-entropy alloys can be adjusted via introducing new doping elements, which are selected according to working conditions. The high-entropy alloy CoCrFeMoNi was examined to determine the impact of Ti doping on its micro-structure, microhardness and elastic modulus. Microstructure analysis revealed a core structure consisting of both face-centered cubic (FCC) and body-centered cubic (BCC) phases, along with the formation of a Laves phase. The addition of Ti made the alloy grains finer and reduced the Mo concentration difference between the interdendritic and dendritic regions. As a result of Ti doping, the microhardness of the alloy increased from 369 HV 0.2 to 451 HV 0.2. Ti doping produced a doubling of the breaking strength value, although no significant changes were observed in the elastic modulus of the CoCrFeMoNi alloy.
ISSN: 2075-4701
DOI: 10.3390/met13050854
Source: Metals [EISSN 2075-4701], v. 13 (5), 854, (Mayo 2023)
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