Cyclic plasticity and deformation mechanism of AlCrCuFeNi high entropy alloy

High entropy alloys (HEAs) are newer siblings of multi-component metallic compound alloys with high tensile strength and ductility. The impact of temperature and strain rates under cyclic plasticity of AlCrCuFeNi HEA are investigated using molecular dynamics (MD) simulations. The modeling results show that interactions between partial dislocations in AlCrCuFeNi HEA during cycle deformation cause various lattice disorders. The impact of Bauschinger in the HEA is minimized by lattice disorder, which prevents dislocations from moving in reverse. Temperature, strain rates, and the twin boundary significantly impact Bauschinger's effect, which influences the plasticity cycle of AlCrCuFeNi. Furthermore, the effect of tem- perature, strain rates, and grain boundaries on lattice disorder is disclosed. The current study provides new insights into the mechanical property of AlCrCuFeNi HEA subjected to cyclic plasticity and deformation mechanism with atomic size.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

The impact of temperature and strain rates on the cyclic plasticity of AlCrCuFeNi high entropy alloy (HEA) was investigated using molecular dynamics (MD) simulations. The results revealed that interactions between partial dislocations in the HEA caused lattice disorders, which minimized the Bauschinger effect. The study also highlighted the influence of temperature, strain rates, and grain boundaries on lattice disorder and provided new insights into the deformation mechanism of AlCrCuFeNi HEA.