TY - Journal Article AU - Sanchez, Jon Mikel AU - Vicario, Iban AU - Albizuri, Joseba AU - Guraya, Teresa AU - Koval, Natalia AU - Garcia, Jose TI - Compound Formation and Microstructure of As-Cast High Entropy Aluminums PY - 2018 PB - Multidisciplinary Digital Publishing Institute (MDPI) 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). SN - 2075-4701 UR - http://hdl.handle.net/11556/510 DX - 10.3390/met8030167 ER -