Precipitation hardening in CoCrFeNi-based high entropy alloys

Recrystallized microstructures and mechanical properties of a C-containing CoCrFeNiMn-type high-entropy alloy

“…This problem is typical of single fcc phase HEAs based on 3d transition metals [3,26]. A proper tailoring of the chemical composition along with microstructure modification using thermal/thermomechanical treatment resulted in alloys, which showed a significant increment in strength without sacrifice in ductility due to the formation of fine fcc grains and/or nanoscale precipitates of second phase(s) [10,14,[27][28][29][30][31][32][33][34]. The most significant strengthening was found to be induced by nanoscale precipitates (e.g.…”

L12-strengthened high-entropy alloys for advanced structural applications

“…Although a single-FCC HEA matrix alone is insufficiently strong, its exceptionally high ductility and outstanding strain-hardening capacity enable them serving as an excellent base alloy for further precipitation hardening. [18][19][20] The strategy of which has been demonstrated as one of the most powerful approaches to strengthen metallic materials for structural applications at both ambient and elevated temperatures. 21,22 Various kinds of second-phase intermetallics, such as r, l, Laves, B2-NiAl, BCC, carbides, and L1 2 phases (c9), have been actively investigated.…”

Surface Modification of FeCoNiCr Medium-Entropy Alloy (MEA) Using Octadecyltrichlorosilane and Atmospheric-Pressure Plasma Jet

“…This alloy family is based on face-centered cubic (fcc) FeCoNiCr solid solution [5]. Due to the high potential for applications, various methods were introduced to further improve the properties of FeCoNiCr MEA, including elemental alloying [6,7], precipitation hardening [8,9], and processing [10,11]. To utilize MEAs into real applications, their surface properties and corrosion resistance are critical concerns.…”