Hot Compression Behavior of a Novel High Entropy Alloy

In this study, the flow behavior of a novel high entropy alloy, (FeNi)67Cr15Mn10Al5Ti3, was investigated through isothermal compression performed at temperature range 980–1100 °C using strain rates 0.01 s?1 and 0.1 s?1. The alloy mainly composed face-centered cubic (FCC) phase small amount body-centered (BCC) phase. During deformation, exhibited typical single-peak type curve all testing conditions. stress exponent determined to be ~5.5 with an apparent activation energy ~426 kJ/mol, which indicated that dislocation creep rate-controlling process. Metallurgical inspection revealed due plastic incompatibility two phases, deformation is non-uniform especially lower higher rate. Continuous dynamic recrystallization (CDRX) intensively occurred in both but seemed much easier BCC Dense low angle grain boundaries (LAGBs) were produced as consequence CDRX. At rate, LAGB ratio evidently decreased increasing temperature. sub-grain size sensitive parameter A rate beneficial for refinement straining required.