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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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).

Original language	English
Article number	167
Journal	Metals
Volume	8
Issue number	3
DOIs	https://doi.org/10.3390/met8030167
Publication status	Published - 9 Mar 2018

Keywords

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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10.3390/met8030167

Metals-08-00167Final published version, 3.9 MB

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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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author = "Sanchez, {Jon Mikel} and Iban Vicario and Joseba Albizuri and Teresa Guraya and Natalia Koval and Jose Garcia",

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T1 - Compound Formation and Microstructure of As-Cast High Entropy Aluminums

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).

KW - Lightweight high entropy alloys

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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DO - 10.3390/met8030167

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SN - 2075-4701

VL - 8

JO - Metals

JF - Metals

IS - 3

M1 - 167

ER -

Compound Formation and Microstructure of As-Cast High Entropy Aluminums

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Keywords

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