Microstructure Evolution and Dynamic Precipitation Behavior of Mg–10Gd–4Y–1Sm–0.5Zr Alloy During Backward Hot Extrusion

Yan, Lipeng; Li, Q. A.; Chen, X. Y.

doi:10.1007/s12540-020-00661-5

Cited by 7 publications

(1 citation statement)

References 39 publications

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“…[ 1–3 ] However, Mg alloys also have disadvantages, such as poor formability and plasticity. [ 4 ] The primary reason is that Mg alloy has a hexagonal close‐packed (HCP) structure, which cannot meet the von Mises’ criterion. [ 5 ] At least five independent slip systems need to be activated to satisfy the plastic deformation of polycrystalline materials.…”

Section: Introductionmentioning

confidence: 99%

Plasticity Improvement of Mg Alloys with Alloying Atoms (Gd, Y)

Pang

Mei

et al. 2022

Physica Status Solidi (b)

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Low plasticity limits the wide application of magnesium alloys. The influence of atoms (Gd, Y) on the generalized stacking fault energy (GSFE) is investigated by density functional theory (DFT), and the possibility of activating basal and nonbasal slip systems is quantified. The lattice parameters and elastic constants are also calculated via DFT. The tensile tests of Mg–2Gd, Mg–2Y, and Mg–2Gd–2Y (at%) are carried out to verify the calculated results. It is found that both Gd and Y atoms can improve plasticity, and Gd has a better effect than Y. The different degrees of influence are mainly due to the different electron types of atoms. Gd belongs to the s‐ and f‐electron type and Y belongs to the d‐electron type. The further calculation of the electron density difference indicates that Y weakens the influence of the Gd atom, and the mechanism diagram is constructed.

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Section: Introductionmentioning

confidence: 99%