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The crystal structure and atomic coordinates of βF′ in aged samples of a Mg–3wt.%Nd alloy are examined using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and the first-principles density functional theory (DFT). It is found that the lattice parameters and the atomic positions in the orthorhombic βF′ unit cell deviate from the atomic model that has been generally...
A linear chain distribution of β′ precipitates is found in a Mg-2.4Gd-0.1Zr (at.%) alloy crept at 250°C for 155h or longer under a uniform tensile stress in a range of 80–120MPa, which is distinctly different from the random distribution of β′ precipitates in the same alloy before creep tests. In this work, the influences of the applied stress and dislocations on the distribution of β′ precipitates...
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