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- W3100969730 abstract "Frist-principles calculations combined with exact muffin-tin orbitals (EMTO) and coherent potential approximation (CPA) methods are conducted to investigate the effects of Cu content on mechanical properties of CrFeCoNiCu x (0 ≤ x ≤ 0.3) high-entropy alloys (HEAs), and the dependencies of relevant physical parameters on Cu content in HEAs are shown and discussed in this work. It is found that the equilibrium lattice constant increases linearly and the elastic constant decreases gradually with increasing Cu content, and the crystal structure of CrFeCoNiCu x (0 ≤ x ≤ 0.3) HEAs can preserve mechanical stability according to the stability criterion of cubic crystals. From the general trend, adding Cu atoms to CrFeCoNi-based HEAs will reduce elastic moduli, Vickers hardness, and yield strength, whereas ductility and plasticity of HEAs show the opposite trend. Also, three different dislocations, including screw, edge, and mixed dislocations, and twins are more likely to occur in HEAs with high Cu content because energy factors decrease steadily and dislocation widths increase gradually with increasing Cu content. The present results provide valuable theoretical verification for further research on the mechanical properties of CrFeCoNiCu x (0 ≤ x ≤ 0.3) HEAs." @default.
- W3100969730 created "2020-11-23" @default.
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- W3100969730 date "2020-01-01" @default.
- W3100969730 modified "2023-10-15" @default.
- W3100969730 title "Mechanical properties of CrFeCoNiCux (0 ≤ x ≤ 0.3) HEAs from first-principles calculations" @default.
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- W3100969730 doi "https://doi.org/10.1039/d0ra08322d" @default.
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