Hot deformation behavior and constitutive modeling of a cost-effective Al8Cr12Mn25Ni20Fe35 high-entropy alloy

In this study, a new non-equiatomic and cost-effective high-entropy alloy (HEA), Al8Cr12Mn25Fe35Ni20, was designed using thermodynamic parameters prepared by arc melting. The subjected to homogenization at 1200 °C hot-rolling reduction of 50%. hot deformation behavior mechanism were studied varying strain rates ranging from 0.01 10 s?1 temperatures 900° 1100°C via plane compression tests Gleeble 3800 thermo-mechanical simulator. phase structure the rolled electron backscattered diffraction (EBSD), X-ray diffraction, differential thermal analysis detect transformation. constitutive model implemented predict high-temperature flow stress Zener-Holloman parameter (Z), which correlated well with experimental values. HEA exhibited relatively high activation energy for 389.5 kJ.mol?1, i.e., comparable those equiatomic HEAs in literature. hot-deformed microstructural features EBSD, revealed discontinuous dynamic recrystallization as main softening mechanism. Dynamic (DRX) showed formation fine grains along initial grain boundaries, accompanied Al-Ni-rich B2 precipitates recrystallized boundaries.