Strain‐Rate Sensitive Deformation Behavior under Tension and Compression of Al _0.3 CrFeCoNiMo _0.2

Herein, the strain‐rate sensitive deformation behavior of a sintered Al‐ and Mo‐modified CrFeCoNi high‐entropy alloy (HEA) is focused. The microstructure investigated using scanning electron microscopy (SEM), backscatter diffraction (EBSD), energy‐dispersive X‐ray spectroscopy (EDS), diffraction. It was found that after sintering, very low porosity (<1%) consists an ultrafine Mo‐ Cr‐rich σ phase embedded in fine‐grained face‐centered cubic (FCC) matrix. Electron reveals another secondary which Al Ni are concentrated. For detailed discussion under tension compression, tensile compression tests were conducted at strain rates 10 −3 , 10, 2 s −1 . Strain‐rate terms strength observed. hardening show no significant rate sensitivity (SRS) up to However, higher compressive loading, distinctly increased found. Tension/compression asymmetry determined since SRS value m twice as high than tension.