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Morphology and variant selection (VS) of grain boundary (GB) allotriomorphs and Widmanstätten side-plates of α phase in an α/β titanium alloy, Ti-6Al-4V (wt%), are investigated using a three-dimensional phase field model. The structures of low-angle GBs (misorientation θm ≤ 10°) are modeled as discrete dislocation networks using Frank-Bilby theory. It is shown that α allotriomorphs and side-plates...
The high strength of magnesium alloy WE54 (Mg–5wt.% Y–2wt.% Nd–2wt.% RE) is achieved through aging at 150–250°C, during which precipitation of intermediate phases β 1 and β′ and equilibrium phase β takes place. In order to understand the microstructure evolution of β 1 phase and its effects on β′ and β precipitation, a phase field model of β 1 precipitation is developed. Model...
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