Microstructures and mechanical properties of FeCoNi(MoW) high-entropy alloys

• DOI: 10.1016/j.matlet.2021.131250
• Publication Date: 2021-11-09T15:45:42Z
• Authors: Lei Pan; AnJin Liu; Lin Wang; XingWang Cheng
• Keywords: Elongation; Brittleness; High-Entropy Alloys

Abstract FeCoNi(MoW)x (x = 0.2, 0.3, 0.5) high-entropy alloys with different W and Mo additions are investigated in this paper. There was segregation of W and Mo elements in the as-cast alloy. FeCoNi(MoW)x alloys are mainly FCC phase and μ phase. With the increase of W and Mo content, more μ phase is precipitated in the FCC matrix. After room temperature quasi-static compressive and tensile tests, with the increase of μ phase content, due to its precipitation strengthening effect, the FeCoNi(MoW)x alloy compressive yield strength increase from 288 MPa to 930 MPa. But its inherent brittleness resulte in a significant decrease in plasticity, when x = 0.5, the elongation is only 0.45%.