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Open AccessArticle

Compound Formation and Microstructure of As-Cast High Entropy Aluminums

1
Department of Foundry and Steel Making, Tecnalia Research & Innovation, 48160 Derio, Spain
2
Department of Mechanical Engineering, Faculty of Engineering of Bilbao, University of the Basque Country, 48013 Bilbao, Spain
3
Department of Mining & Metallurgical Engineering and Materials Science, Faculty of Engineering of Bilbao, University of the Basque Country, 48013 Bilbao, Spain
4
Centro de Física de Materiales CFM/MPC, 20018 San Sebastián, Spain
*
Author to whom correspondence should be addressed.
Metals 2018, 8(3), 167; https://doi.org/10.3390/met8030167
Received: 8 February 2018 / Revised: 2 March 2018 / Accepted: 6 March 2018 / Published: 9 March 2018
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Casting Alloys)
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). View Full-Text
Keywords: lightweight high entropy alloys; complex concentrated alloys; microstructure; intermetallic compounds; Thermo-Calc lightweight high entropy alloys; complex concentrated alloys; microstructure; intermetallic compounds; Thermo-Calc
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MDPI and ACS Style

Sanchez, J.M.; Vicario, I.; Albizuri, J.; Guraya, T.; Koval, N.E.; Garcia, J.C. Compound Formation and Microstructure of As-Cast High Entropy Aluminums. Metals 2018, 8, 167. https://doi.org/10.3390/met8030167

AMA Style

Sanchez JM, Vicario I, Albizuri J, Guraya T, Koval NE, Garcia JC. Compound Formation and Microstructure of As-Cast High Entropy Aluminums. Metals. 2018; 8(3):167. https://doi.org/10.3390/met8030167

Chicago/Turabian Style

Sanchez, Jon M.; Vicario, Iban; Albizuri, Joseba; Guraya, Teresa; Koval, Natalia E.; Garcia, Jose C. 2018. "Compound Formation and Microstructure of As-Cast High Entropy Aluminums" Metals 8, no. 3: 167. https://doi.org/10.3390/met8030167

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