The growth mechanisms of θ′ precipitate phase in an Al-Cu alloy during aging treatment
Lin Gao, Kai Li, Song Ni, Yong Du, Min Song*()

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Fig. 6.. Schematics of the α1-to-θ' transformation in (a-d) for Fig. 4 and (e-g) for Fig. 5, respectively. Green and orange spheres represent Al and Cu atoms, respectively. Gray spheres represent positions that can be occupied by an Al atom with a probability of 1/2. Green and orange arrows reflect the diffusion of atoms. Dotted line circles represent atoms before diffusion.