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We investigated the microstructural evolution of Mg–3Al–1Zn (AZ31) alloy systems, with Ca or CaO added, by carrying out microstructural characterizations in conjunction with thermodynamic calculations. A calculated phase diagram of the Mg–Ca–O ternary system showed that CaO can be dissolved in liquid Mg so as to have 12.6wt.% Ca content in the liquid Mg at 700°C. Therefore, for a 0.3wt.% CaO-added...
A series of nanocrystalline Fe–C alloys with different carbon concentrations (x tot ) up to 19.4at.% (4.90wt.%) are prepared by ball milling. The microstructures of these alloys are characterized by transmission electron microscopy and X-ray diffraction, and partitioning of carbon between grain boundaries and grain interiors is determined by atom probe tomography. It is found that the segregation...
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