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Face-centered cubic (FCC)-structured high-entropy alloys (HEAs) are facing a major challenge due to a trade-off between strength and ductility. In this paper, we systematically investigated the microstructural evolution and tensile properties of metastable dual-phase (DP) FeMnCoCr HEAs via cold rolling and partial recrystallized annealing, which resulted in a heterogeneous microstructure, and by inducing strengthening and strain-hardening through heterogeneous deformation-induced (HDI) strategies. The results show that the alloy was annealed at 600 °C for 10 min, exhibiting a good combination of strength and ductility. A higher alloy strength was obtained via HDI strengthening, while FCC → HCP phase transformation, deformation twins, and HDI strain-hardening contributed to the excellent ductility. The results provide a viable method for the design of subsequent alloys. [ABSTRACT FROM AUTHOR]

(CrMoNbTaZr)NX coatings were deposited on Si (100) by magnetron sputtering under various N2/(Ar+N2) flow ratios. An X-ray diffractometer, transmission electron microscopy, scanning electron microscopy and atomic force microscopy were used to characterize the crystallinity and microstructure of the films. The elemental composition was characterized by energy dispersive spectroscopy and X-ray photoelectron spectroscopy. The hardness and friction coefficient were respectively determined by nanoindentation and nanoscratch. The sheet resistance was studied using a four-point probe. The results suggest that the crystallinity is strongly influenced by the nitrogen content in the films. The chemical stoichiometry of nitride determines the evolutions of the microstructure, mechanical properties and resistivity. Correlations between the microstructure and the properties of the (CrMoNbTaZr)NX films were studied. [ABSTRACT FROM AUTHOR]