Compound Formation and Microstructure of As-Cast High Entropy Aluminums

Jon Mikel Sanchez; Iban Vicario; Joseba Albizuri; Teresa Guraya; Natalia Koval; Jose Garcia

doi:10.3390/met8030167

Compound Formation and Microstructure of As-Cast High Entropy Aluminums

Jon Mikel Sanchez, Iban Vicario, Joseba Albizuri, Teresa Guraya, Natalia Koval, Jose Garcia

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Resumen

The aim of this work is to study the microstructure of four high entropy alloys (HEAs) produced by large scale vacuum die casting. Al40Cu15Mn5Ni5Si20Zn15, Al45Cu15Mn5Fe5Si5Ti5Zn20, Al35Cu5Fe5Mn5Si30V10Zr10, and Al50Ca5Cu5Ni10Si20Ti10 alloys formed a mixture of different structures, containing intermetallic compound (IC) and solid solution (SS) phases. The phases observed in the casting alloys were compared with the equilibrium phases predicted by Thermo-Calc. The measured densities varied from 3.33 g/cm−3 to 5.07 g/cm−3 and microhardness from 437 Hv to 887 Hv. Thus, the microhardness and estimated strength/density ratios are significantly higher than other lightweight high entropy alloys (LWHEAs).

Idioma original	Inglés
Número de artículo	167
Publicación	Metals
Volumen	8
N.º	3
DOI	https://doi.org/10.3390/met8030167
Estado	Publicada - 9 mar 2018

Palabras clave

Lightweight high entropy alloys
Complex concentrated alloys
Microstructure
Intermetallic compounds
Thermo-Calc

Project and Funding Information

Funding Info
This work has been partially funded by the Basque Government through the project Elkartek:_x000D_ KK-2017/00007.

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title = "Compound Formation and Microstructure of As-Cast High Entropy Aluminums",

abstract = "The aim of this work is to study the microstructure of four high entropy alloys (HEAs) produced by large scale vacuum die casting. Al40Cu15Mn5Ni5Si20Zn15, Al45Cu15Mn5Fe5Si5Ti5Zn20, Al35Cu5Fe5Mn5Si30V10Zr10, and Al50Ca5Cu5Ni10Si20Ti10 alloys formed a mixture of different structures, containing intermetallic compound (IC) and solid solution (SS) phases. The phases observed in the casting alloys were compared with the equilibrium phases predicted by Thermo-Calc. The measured densities varied from 3.33 g/cm−3 to 5.07 g/cm−3 and microhardness from 437 Hv to 887 Hv. Thus, the microhardness and estimated strength/density ratios are significantly higher than other lightweight high entropy alloys (LWHEAs).",

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AU - Sanchez, Jon Mikel

AU - Vicario, Iban

AU - Albizuri, Joseba

AU - Guraya, Teresa

AU - Koval, Natalia

AU - Garcia, Jose

PY - 2018/3/9

Y1 - 2018/3/9

N2 - The aim of this work is to study the microstructure of four high entropy alloys (HEAs) produced by large scale vacuum die casting. Al40Cu15Mn5Ni5Si20Zn15, Al45Cu15Mn5Fe5Si5Ti5Zn20, Al35Cu5Fe5Mn5Si30V10Zr10, and Al50Ca5Cu5Ni10Si20Ti10 alloys formed a mixture of different structures, containing intermetallic compound (IC) and solid solution (SS) phases. The phases observed in the casting alloys were compared with the equilibrium phases predicted by Thermo-Calc. The measured densities varied from 3.33 g/cm−3 to 5.07 g/cm−3 and microhardness from 437 Hv to 887 Hv. Thus, the microhardness and estimated strength/density ratios are significantly higher than other lightweight high entropy alloys (LWHEAs).

AB - The aim of this work is to study the microstructure of four high entropy alloys (HEAs) produced by large scale vacuum die casting. Al40Cu15Mn5Ni5Si20Zn15, Al45Cu15Mn5Fe5Si5Ti5Zn20, Al35Cu5Fe5Mn5Si30V10Zr10, and Al50Ca5Cu5Ni10Si20Ti10 alloys formed a mixture of different structures, containing intermetallic compound (IC) and solid solution (SS) phases. The phases observed in the casting alloys were compared with the equilibrium phases predicted by Thermo-Calc. The measured densities varied from 3.33 g/cm−3 to 5.07 g/cm−3 and microhardness from 437 Hv to 887 Hv. Thus, the microhardness and estimated strength/density ratios are significantly higher than other lightweight high entropy alloys (LWHEAs).

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KW - Complex concentrated alloys

KW - Microstructure

KW - Intermetallic compounds

KW - Thermo-Calc

KW - Lightweight high entropy alloys

KW - Complex concentrated alloys

KW - Microstructure

KW - Intermetallic compounds

KW - Thermo-Calc

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Compound Formation and Microstructure of As-Cast High Entropy Aluminums

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Palabras clave

Project and Funding Information

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