Phases, microstructures and properties of multi-component FeCoNi-based alloys
Ning Liu, Wen Ding, Xiaojing Wang, Jing Zhang, Peng Zhou, Mu Chen
Abstract
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) 60 Al 15 Cr 25 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) 85 Al 15 < (FeCoNi) 75 Cr 25 < (FeCoNi) 60 Al 15 Cr 25 . Moreover, the oxidation kinetic curves of the alloys follow a power-law dependence. (FeCoNi) 60 Al 15 Cr 25 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.