TY - JOUR N2 - This study investigates the microstructures and the mechanical properties of equiatomic Ti20Mo20Ta20Nb20V20 and non-equiatomic Ti40Mo15Ta15Nb15V15 and Ti60Mo10Ta10Nb10V10 HEAs using X-ray diffraction (XRD) analysis, field emission scanning electron microscope (FE-SEM), and micro-Vickers hardness test. The specimens were fabricated using the vacuum arc remelting (VAR) process and homogenized at a temperature of 1300°C for 4 h in a vacuum atmosphere. The determined thermodynamic parameters, Ω ≥ 1.1, δ ≤ 6.6%, and VEC < 6.87, suggested that the HEAs consisted of BCC solid solutions. XRD patterns of all the HEAs displayed single BCC phases. The difference in the solidification rate led to the micro-segregation associated with the elements Ta and Mo enriched in the dendrite arms and the elements V and Ti in the inter-dendritic regions. The HEA specimens showed a decrease in hardness with higher concentration of Ti element because the intrinsic hardness of Ti is lower as compared to the intrinsic hardness of Nb and Mo. L1 - http://journals.pan.pl/Content/116816/PDF/AMM-2020-4-15-Kwangmin%20Lee.pdf L2 - http://journals.pan.pl/Content/116816 PY - 2020 IS - No 4 EP - 1315 DO - 10.24425/amm.2020.133691 KW - High entropy alloy KW - TiMoTaNbV KW - Vacuum Arc Remelting KW - BCC Phase KW - Micro-segregation A1 - Lee, Seongi A1 - Lee, Kwangmin PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 65 DA - 2020.09.10 T1 - Microstructure and Mechanical Properties of Equiatomic and Non-Equiatomic TiMoTaNbV High Entropy Alloys Prepared Using Vacuum Arc Remelting SP - 1311 UR - http://journals.pan.pl/dlibra/publication/edition/116816 T2 - Archives of Metallurgy and Materials ER -