Compound Formation and Microstructure of As-Cast High Entropy Aluminums

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URI: http://hdl.handle.net/11556/510
ISSN: 2075-4701
ESSN: 2075-4701
DOI: 10.3390/met8030167
Publication date
2018
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Multidisciplinary Digital Publishing Institute (MDPI)
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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).
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Lightweight high entropy alloys , Complex concentrated alloys , Microstructure , Intermetallic compounds , Thermo-Calc
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journal article
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Sanchez, Jon, Iban Vicario, Joseba Albizuri, Teresa Guraya, Natalia Koval, and Jose Garcia. “Compound Formation and Microstructure of As-Cast High Entropy Aluminums.” Metals 8, no. 3 (March 9, 2018): 167. doi:10.3390/met8030167.