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Production and microstructural characterization of an AlCoCrFeNi2.1 multicomponent eutectic alloy under different cooling rates

Grant number: 20/15097-3
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): July 01, 2021
Effective date (End): June 30, 2022
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal researcher:Francisco Gil Coury
Grantee:Pedro Henrique de Siqueira Mancilha
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Multicomponent alloys, high or medium-entropy alloys or complex concentrated alloys are designations of a new class of metal alloys that feature several main elements. Since there are many possible compositions, these alloys exhibit a wide range of properties, especially mechanical, when compared to traditional ones. In addition, as in traditional alloys, solidification can result in a eutectic microstructure in certain compositions, as is the case of the AlCoCrFeNi2.1 alloy, whose mechanical properties are highly sensitive to the employed processing route. In this work, samples will be produced by rapid solidification in copper mold through melting in electric arc furnace and casting by centrifugation. The cooling rates will be determined by comparison with 304 stainless steel samples produced under the same conditions as the ingots of the AlCoCrFeNi2.1 alloy. The rapidly solidified samples will be studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Vickers microhardness. With the results, it will be possible to better understand how the cooling rate during solidification influences the microstructure and the mechanical properties of the multicomponent eutectic alloy AlCoCrFeNi2.1.

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