Strain Rate Effects on the Mechanical Properties of an AlCoCrFeNi High-Entropy Alloy
作者： Chuan Ting Wang , Yuan He , Yong He , Zhiping Guo , Zhiping Guo
DOI: 10.1007/S12540-020-00920-5
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摘要: The effect of strain rate on the compressive properties an AlCoCrFeNi high-entropy alloy (HEA) was investigated. Microstructure HEA observed using scanning transmission microscopy (SEM) and electron microscopy. results showed formation a homogeneous two-phase structure. Quasi-static compression tested under initial engineering rates between 10–4 10–2 s−1. Engineering stress exceeding 2500 MPa ductility around 12% achieved. Dynamic mechanical behavior at room temperature characterized by split-Hopkinson pressure bar 1350 4000 s−1. exhibited high sensitivity, especially dynamic compression. fluctuation yield strength variation hardening with various parameters constitutive equation for deformation were obtained from experimental data. equations can be applied to predict stain rates.
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