Atomic structure of T1 precipitates in Al–Li–Cu alloys revisited with HAADF-STEM imaging and small-angle X-ray scattering
作者： P. Donnadieu , Y. Shao , F. De Geuser , G.A. Botton , S. Lazar
DOI: 10.1016/J.ACTAMAT.2010.09.044
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摘要: The structure of T1 precipitates which formed under ageing in Al–Li–Cu alloys has been studied using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) imaging. Complementary information on the precipitate composition has been obtained on the same system by small-angle X-ray scattering (SAXS). According to HAADF-STEM imaging, the currently accepted structures based on the stacking of {111} type planes are ruled out. It is shown that the T1 precipitate structure is consistent with the one …
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