High-entropy alloys fabricated via powder metallurgy. A critical review

High-entropy alloys (HEAs) have attracted a great deal of interest over the last 14 years. One\nreason for this level of interest is related to these alloys breaking the alloying principles that\nhave been applied for many centuries. Thus, HEAs usually possess a single phase (contrary to\nexpectations according to the composition of the alloy) and exhibit a high level of\nperformance in different properties related to many developing areas in industry. Despite\nthis significant interest, most HEAs have been developed via ingot metallurgy. More recently,\npowder metallurgy (PM) has appeared as an interesting alternative for further developing\nthis family of alloys to possibly widen the field of nanostructures in HEAs and improve some\ncapabilities of these alloys. In this paper, PM methods applied to HEAs are reviewed, and\nsome possible ways to develop the use of powders as raw materials are introduced.