Microstructure and Adjustment in Tensile Strength of Al<sub>0.8</sub>CoCrFeNi Fibers

Suárez, Néstor R. Florido; Socorro-Perdomo, Pedro P.; Voiculescu, Ionelia; Rosca, Julia Claudia Mirza

doi:10.1017/s1431927621011648

Cited by 2 publications

(1 citation statement)

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“…HEAs contain numerous principal elements in high concentrations, unlike traditional alloys, which usually contain one or two main elements with minor amounts of other elements added to enhance certain properties. The high-entropy concept was introduced in 2004 by two different groups [1,2] and since then, a variety of HEAs have been developed and studied, including alloys containing elements such as nickel [3,4], aluminum [5,6], titanium [7,8] and molybdenum [9]. One of the defining characteristics of HEAs is their high configurational entropy, which is a measure of the degree of disorder in the arrangement of atoms within a material.…”

Section: Introductionmentioning

confidence: 99%

Impact of Ti Doping on the Microstructure and Mechanical Properties of CoCrFeMoNi High-Entropy Alloy

Brito-Garcia

Rosca

Jiménez-Marcos

et al. 2023

Metals

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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.

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