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

publication date

  • March 2019

start page

  • 84

end page

  • 114

issue

  • 2

volume

  • 62

International Standard Serial Number (ISSN)

  • 0032-5899

Electronic International Standard Serial Number (EISSN)

  • 1743-2901

abstract

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

keywords

  • high-entropy alloys; powder metallurgy; mechanical alloying; spark plasma sintering; high-performance materials; stacking-fault energy; hydrogen storage properties; solid-solution phase; mechanical-properties; strengthening mechanisms; corrosion-resistance; tensile properties; thermal-stability; compressive properties; ti(c,n)-based cermets