Disordered and ordered solid solution phases are identified in FeCoNi-based multi-component alloys. An ultimate strength of 2380 MPa was achieved in the dual face-centered cubic + body-centered cubic structural (FeCoNi)60Al15Cr25 alloy, accompanied by a fracture strain of 38% and a hardness of 376.3 HV. After holding at 900°C for 100 h, oxidation resistance of the alloys follows by an increasing rank of (FeCoNi)85Al15 < (FeCoNi)75Cr25 < (FeCoNi)60Al15Cr25. Moreover, the oxidation kinetic curves of the alloys follow a power-law dependence. (FeCoNi)60Al15Cr25 alloy shows a good trade-off of mechanical properties and an excellent oxidation resistance at evaluated temperature, and can be a potential candidate for high temperature materials.
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