Microstructural Characterization and Optimization of CoCrCuFeMnNi High Entropy Alloy to be in Contact with Hydrogen

O. Gordo-Burgoa; P. Garcia-Michelena; L. Armendariz; I. Vicario; E. Mardaras; G. Arruebarrena; I. Hurtado

Microstructural Characterization and Optimization of CoCrCuFeMnNi High Entropy Alloy to be in Contact with Hydrogen

O. Gordo-Burgoa^*, P. Garcia-Michelena, L. Armendariz, I. Vicario, E. Mardaras, G. Arruebarrena, I. Hurtado

^*Corresponding author for this work

Smart, efficient and sustainable metal processes

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Abstract

This study aims to develop a High Entropy Alloy (HEA) with reduced susceptibility to Hydrogen embrittlement (HE) and improved resistance to oxidation, potentially surpassing existing materials in hydrogen-rich environments. Microstructural analysis revealed a dendritic structure where two FCC phases have been formed: a dendritic zone with the designed composition and a Cu-rich interdendritic structure with reduced Mn content. The second phase has been eliminated with the application of heat treatment but Cr-rich segregation in grain boundary appeared during a prolongated exposure at 1100℃, which could correspond to σ phase. Segregation of σ phase might be eliminated with an optimization of the composition or heat treatment conditions, achieving a single-phase solid solution.

Original language	English
Pages	130-131
Number of pages	2
Publication status	Published - 2024
Event	75th World Foundry Congress, WFC 2024 - Deyang, China Duration: 25 Oct 2024 → 30 Oct 2024

Conference

Conference	75th World Foundry Congress, WFC 2024
Country/Territory	China
City	Deyang
Period	25/10/24 → 30/10/24

Keywords

High Entropy Alloys
Hydrogen Embrittlement
Interdendritic structure
Single-phase solid solution

Cite this

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title = "Microstructural Characterization and Optimization of CoCrCuFeMnNi High Entropy Alloy to be in Contact with Hydrogen",

abstract = "This study aims to develop a High Entropy Alloy (HEA) with reduced susceptibility to Hydrogen embrittlement (HE) and improved resistance to oxidation, potentially surpassing existing materials in hydrogen-rich environments. Microstructural analysis revealed a dendritic structure where two FCC phases have been formed: a dendritic zone with the designed composition and a Cu-rich interdendritic structure with reduced Mn content. The second phase has been eliminated with the application of heat treatment but Cr-rich segregation in grain boundary appeared during a prolongated exposure at 1100℃, which could correspond to σ phase. Segregation of σ phase might be eliminated with an optimization of the composition or heat treatment conditions, achieving a single-phase solid solution.",

keywords = "High Entropy Alloys, Hydrogen Embrittlement, Interdendritic structure, Single-phase solid solution",

author = "O. Gordo-Burgoa and P. Garcia-Michelena and L. Armendariz and I. Vicario and E. Mardaras and G. Arruebarrena and I. Hurtado",

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language = "English",

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TY - CONF

T1 - Microstructural Characterization and Optimization of CoCrCuFeMnNi High Entropy Alloy to be in Contact with Hydrogen

AU - Gordo-Burgoa, O.

AU - Garcia-Michelena, P.

AU - Armendariz, L.

AU - Vicario, I.

AU - Mardaras, E.

AU - Arruebarrena, G.

AU - Hurtado, I.

PY - 2024

Y1 - 2024

N2 - This study aims to develop a High Entropy Alloy (HEA) with reduced susceptibility to Hydrogen embrittlement (HE) and improved resistance to oxidation, potentially surpassing existing materials in hydrogen-rich environments. Microstructural analysis revealed a dendritic structure where two FCC phases have been formed: a dendritic zone with the designed composition and a Cu-rich interdendritic structure with reduced Mn content. The second phase has been eliminated with the application of heat treatment but Cr-rich segregation in grain boundary appeared during a prolongated exposure at 1100℃, which could correspond to σ phase. Segregation of σ phase might be eliminated with an optimization of the composition or heat treatment conditions, achieving a single-phase solid solution.

AB - This study aims to develop a High Entropy Alloy (HEA) with reduced susceptibility to Hydrogen embrittlement (HE) and improved resistance to oxidation, potentially surpassing existing materials in hydrogen-rich environments. Microstructural analysis revealed a dendritic structure where two FCC phases have been formed: a dendritic zone with the designed composition and a Cu-rich interdendritic structure with reduced Mn content. The second phase has been eliminated with the application of heat treatment but Cr-rich segregation in grain boundary appeared during a prolongated exposure at 1100℃, which could correspond to σ phase. Segregation of σ phase might be eliminated with an optimization of the composition or heat treatment conditions, achieving a single-phase solid solution.

KW - High Entropy Alloys

KW - Hydrogen Embrittlement

KW - Interdendritic structure

KW - Single-phase solid solution

UR - http://www.scopus.com/inward/record.url?scp=86000026092&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:86000026092

SP - 130

EP - 131

T2 - 75th World Foundry Congress, WFC 2024

Y2 - 25 October 2024 through 30 October 2024

ER -

Microstructural Characterization and Optimization of CoCrCuFeMnNi High Entropy Alloy to be in Contact with Hydrogen

Abstract

Conference

Keywords

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