Design, fabrication, and characterization of high-entropy alloys (HEAs) of the type TiVCrX (X = Al, Mn, Mo)

Abstract

According to Zhang et al. (Prog Mater Sci 61:1, 2014, https://doi.org/10.1016/j.pmatsci.2013.10.001), High-Entropy Alloys (HEAs) are an emerging class of advanced materials that contain multiple elements in equiatomic or near equiatomic concentrations. In recent years, extensive efforts have been made to design HEAs with suitable microstructures and superior properties. This work reports the preliminary results of fabrication and characterization of three HEAs (TiVCrAl, TiVCrMn, TiVCrMo) with equiatomic compositions. These HEAs were designed with the purpose of producing a single-phase BCC, according to calculations with the HEAPS (Martin et al. in Comput Phys Commun 278:108398, 2022, https://doi.org/10.1016/j.cpc.2022.108398) and CALPHAD programs. Microstructures consisting of BCC + C14 Laves phases (Mn), a mixture of two cubic phases (Mo) and a single BCC phase, were found, basically consistent with CALPHAD predictions, although the phase volume fractions and compositions were not accurately predicted. Graphical abstract: [Figure not available: see fulltext.]