Fig. 5: TEM characterisation of the evolution of intermetallic phases in FSP sample during natural ageing.
From: Corrosion resistant and high-strength dual-phase Mg-Li-Al-Zn alloy by friction stir processing
a BF-STEM showing dense nano-precipitates and (b, c) atomic-scale HAADF-STEM showing the structure of nano-precipitates in the β-phase matrix, as indicated by red arrows. d–g HAADF-STEM images and corresponding EDS-STEM Al mapping of FSP sample after natural ageing for (d, e) 3 months and (f, g) 2 years. Yellow and red frames in the inset FFT pattern in (a) indicated the diffractions from the α and β phase, and arrows in inset FFT in (a, c) and diffraction pattern in (f) indicated the diffraction from the θ phase. The incident beam was parallel to [001]β.
