Low-cycle fatigue properties of CoCrFeMnNi high-entropy alloy compared with its conventional counterparts

Deformation mechanisms of CoCrFeMnNi high-entropy alloy under low-cycle-fatigue loading

“…Several studies have been carried out to shed light on the fatigue-crack growth and high-cycle fatigue behavior of equiatomic CoCrFeMnNi [4][5][6]. Recently, an increasing number of investigations have also been dedicated to unraveling its low-cycle fatigue (LCF) behavior [7][8][9][10][11]. Though these works provide important initial insights into the LCF response of CoCrFeMnNi, some of their conclusions need to be reconfirmed and several other important aspects still remain unexplored.…”

Superior low-cycle fatigue properties of CoCrNi compared to CoCrFeMnNi

“…However, engineering alloys are usually not only loaded monotonically in service but also cyclically. Few studies, concerning the fatigue properties of HEAs have been reported [14][15][16][17][18][19], where it was shown that CoCrFeMnNi demonstrates a higher low-cycle fatigue (LCF) resistance compared to common FCC steels [14,19]. Recently, Rackwitz et al [20] revealed a superior fatigue crack propagation resistance of CoCrNi compared to CoCrFeMnNi [21], especially at cryogenic temperatures, where the increased propensity of nanotwinning decreased the crack growth rate.…”

Thermally activated dependence of fatigue behaviour of CrMnFeCoNi high entropy alloy fabricated by laser powder-bed fusion

“…In particular, the fatigue life behaviour at room and elevated temperatures (e.g. at 550 °C) was reported to be comparable to austenitic FCC steels [41,42]. These results indicate this alloy holds potential as a reliable structural alloy not only at cryogenic conditions but also at elevated temperatures In particular, additive manufacturing is considered as a feasible method that enables to build infrastructures, fabricate spacecraft components and supplies for critical maintenances in the circumstances of interplanetary explorations where the availability of cargo resupply is extremely limited.…”