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- W1625616673 abstract "The elastic properties of ferromagnetic Fe1−x−yMnyAlx (0 ≤ x ≤ 0.5, y = 0, 0.1, and 0.2) random solid solutions in the body-centered cubic (bcc) crystallographic phase have been investigated using the ab initio exact muffin-tin orbitals method in combination with the coherent-potential approximation. Comparison with the experimental data demonstrates that the employed theoretical approach accurately captures the observed composition dependence of the lattice parameter. The predicted elastic parameters follow complex composition dependence. The C11, C12, and C′ = (C11 − C12)/2 single-crystal elastic constants, the bulk (B), shear (G), and Young's (E) moduli, and the Cauchy pressure (C12 − C44) mainly decrease with increasing Al content, whereas the Zener anisotropy ratio (C44/C′) strongly increases with x. C44 exhibits a non-linear x dependence. The Poisson (v) and Pugh (B/G) ratios first decrease with x but show non-monotonous behavior in high-Al alloys. In terms of the Pugh criterion, these trends suggest an increased brittleness in Al-containing alloys. Manganese has a complex non-monotonous effect on B/G in low-Al alloys (below ∼15 at. % Al) but enhances the brittleness of the bcc solid solution in large-Al regime. The peculiar Mn alloying effect is explained in terms of magneto-volume mechanisms." @default.
- W1625616673 created "2016-06-24" @default.
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- W1625616673 date "2015-09-11" @default.
- W1625616673 modified "2023-10-14" @default.
- W1625616673 title "<i>Ab initio</i>determination of the elastic properties of ferromagnetic body-centered cubic Fe-Mn-Al alloys" @default.
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- W1625616673 doi "https://doi.org/10.1063/1.4930162" @default.
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