Constitutive modeling and strain hardening of CoCrFeNiAlx high-entropy alloys

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Abstract
The mechanical behaviors of CoCrFeNiAlx (x=0, 0.3) high-entropy alloys are investigated under quasi-static loading. Evolution of phases and microstructures is analyzed by using the x-ray diffraction, scanning electron microscope and transmission electron microscopy. A constitutive model based on the crystal plasticity theory is presented and an explicit algorithm is constructed for calculation. Dislocation density based hardening model is used to describe the strain hardening behavior. Constitutive model validation is performed by comparison of numerical results with experimental data. Evolution of dislocation density with various slip systems during plastic deformation is established to reveal the effect of Al addition on the CoCrFeNi based alloys.
Funding Information
  • National Natural Science Foundation of China (No.51501123, No.11602158, No.11802199)
  • "1331 project" Key Innovation Teams of Shanxi Province
  • Natural Science Foundation for Young Scientists of Shanxi Province (No.201601D021026)

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