A novel light-weight refractory high-entropy alloy with high specific strength and intrinsic deformability

摘要

AlNb2TiV, a novel, light-weight, refractory high-entropy alloy (RHEA), with high specific strength and excellent room-temperature deformability is identified. As cast, it has a dendritic microstructure with an ordered B2 phase, low density (similar to 6.19 g/cm(3)), excellent specific yield strength (167 MPa*cm(3)/g) and deformability (strain 1.0 in compression). Slip occurs by glide of 1/2 1 1 1 dislocations. Based on previous work, the Ti/Nb ratio of our RHEA falls in the optimal range for easy dislocation motion and good deformability. (C) 2020 Elsevier B.V. All rights reserved.