An Al0.25Ti0.75CoCrFeNi high entropy alloy (HEA), consisting of multiple principal elements, forms the uncommonly observed chi-phase, which is a large lattice parameter intermetallic phase based on the body centered cubic crystal structure, as the matrix phase and a L2(1) phase (ordered Huesler phase, X(2)YZ-type based on the face-centered cubic structure) as a major secondary phase. Additionally, a face centered cubic phase with a high density of nano-twins is also present in the microstructure as a third phase. The extremely high Vicker's hardness of the matrix chi phase (1090Hv +/- 14) and of the L2(1) phase (570 +/- 9 H-V) along with low sliding coefficient of friction (similar to 03) and low wear rate (similar to 12 x 10(-5) mm(3)/ N m) makes this HEA a promising candidate for mechanical wear-resistant applications. (C) 2017 Elsevier B.V. All rights reserved.