Fabrication of high-entropy alloy wire and multi-principal element alloy wire

A method of fabricating a metallic wire, the method comprising:

• combining, to form at least a portion of a preform, (i) one or more first metal powders each comprising a plurality of substantially spherical particles, and (ii) one or more second metal powders each comprising a plurality of non-spherical particles, the one or more second metal powders being mixed with the one or more first metal powders such that a composition of the preform is substantially homogeneous along a length of the preform;
• and
• reducing a diameter of the preform via one or more mechanical deformation processes, thereby forming a metallic wire,
• wherein (i) the metallic wire comprises a high-entropy alloy comprising five or more metallic elements or a multi-principal element alloy comprising four or more metallic elements, (ii) each first metal powder comprises at least one of the metallic elements, (iii) each second metal powder comprises at least one of the metallic elements, (iv) the substantially spherical particles are spherical to within ±10% in any direction such that an eccentricity in any direction does not exceed 10%, and (v) the non-spherical particles (a) are elongated with an aspect ratio of at least 2:1, (b) are acicular, (c) have at least one flat surface, (d) are flakes, (e) have at least one corner or vertex, or (f) are polyhedral.